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HTML 

              
                .cash-register
  .cash-register__total-wrap
    .cash-register__total
      .cash-register__loop
        .cash-register__loop-track(v-bind:style="{'--trans': lines % 10}")
          - for(let c = 0; c < 10; c++)
            sup= c
      .cash-register__loop $
      - for(let i = 0; i < 2; i++)
        .cash-register__loop
          .cash-register__loop-track(v-bind:style=`{'--trans': amount[${i}]}`)
            - for(let c = 0; c < 10; c++)
              div= c
      .cash-register__loop .
      - for(let i = 2; i < 4; i++)
        .cash-register__loop
          .cash-register__loop-track(v-bind:style=`{'--trans': amount[${i}]}`)
            - for(let c = 0; c < 10; c++)
              sup= c
  .cash-register__mid
    .cash-register__receipt-feed
      .cash-register__receipt-container
        ul.cash-register__receipt(v-bind:style="{'--trans': showLines}")
          li.cash-register__receipt-item(v-for="l in receiptLines", :class="subbing ? 'subby' : 'hello'")
    .cash-register__key

  .cash-register__keypad-wrap
    .cash-register__keypad
      - for(let c = 0; c < 3; c++)
        button.cash-register-key.cash-register-key--big-dollar(class=`${c === 0 ? 'cash-register-key--top' : ''}`, data-amount-index="0", v-on:click="addToLine")
        button.cash-register-key.cash-register-key--big-dollar(class=`${c === 0 ? 'cash-register-key--top' : ''}`, data-amount-index="1", v-on:click="addToLine")
        button.cash-register-key(class=`${c === 0 ? 'cash-register-key--top' : ''}`, data-amount-index="2", v-on:click="addToLine")
        button.cash-register-key(class=`${c === 0 ? 'cash-register-key--top' : ''}`, data-amount-index="3", v-on:click="addToLine")
      .cash-register__keypad-spacer
      .cash-register__keypad-actions
        button.cash-register-key.cash-register-key--dep(v-on:click="addLine") Add
        button.cash-register-key.cash-register-key--sub(v-on:click='addSub') Sub
        button.cash-register-key.cash-register-key--tend(v-on:click='tend') Tend
  .cash-register__drawer(v-bind:class="{'cash-register__drawer--open': tending}")
    .cash-register__float
      - for(let n = 0; n < 20; n++)
        .cash-register__note.cash-register__note--float 💵
    .cash-register__cash
      .cash-register__note-wrap(v-for="n in notes", v-bind:style="{'--x': n[0]}")
        .cash-register__note(v-bind:style="{'--y':n[1], '--rotation': n[2]}") 💵
    .cash-register__drawer-front(v-on:click='tend')
!

CSS 

              
                *
*:before
*:after
  box-sizing border-box

$color = #bfbfbf

body
  align-items center
  background-color #36d7b7
  font-family 'Arial', sans-serif
  display flex
  justify-content center
  min-height 100vh
  overflow-x hidden

.cash-register
  &__total-wrap
    display flex
    justify-content flex-end

  &__total
    border 10px solid lighten($color, 45%)
    background black
    display grid
    grid-template-columns repeat(2, 2fr) repeat(2, 3fr) 1fr repeat(2, 2fr)
    grid-gap 0
    height 50px
    width 50%

  &__loop-track
    transform translateY(calc(var(--trans) * -100%))
    transition transform .15s

  &__loop
    $font-size = 30px
    background #111
    color #fafafa
    height $font-size
    line-height $font-size
    overflow hidden
    text-align center

    div
    sup
      height 100%
      display block
      font-size 22px
      text-align center

    sup
      top 0
      font-size .75rem
      line-height 1.25rem

  $keyHeight = 24px
  $keyWidth = 30px
  $keypadPadding = 10px

  &-key
    $keyColor = #eee
    background $keyColor
    border 1px solid darken($keyColor, 25%)
    box-shadow 0 5px 0 darken($keyColor, 60%)
    cursor pointer
    font-size 6px
    font-weight bold
    height $keyHeight
    padding 0
    text-transform uppercase
    transform translateY(0)
    width $keyWidth
    outline 0

    &:active
      transform translateY(5px)
      box-shadow 0 0 0 transparent

    apply-color(c)
      background c
      border 1px solid darken(c, 25%)
      box-shadow 0 5px 0 darken(c, 60%)

    &--top:active
      transform translateY(15px)

    &--big-dollar
      apply-color(rgb(254, 194, 135))
    &--dep
      apply-color(rgb(96, 178, 78))
    &--sub
      apply-color(rgb(247, 189, 201))
    &--tend
      apply-color(rgb(92, 195, 228))
      grid-column 1 / -1
      width 100%


  &__keypad
    clip-path inset(($keyHeight / 2) 0 0 0)
    -webkit-clip-path inset(($keyHeight / 2) 0 0 0)
    display grid
    grid-template-columns repeat(4, $keyWidth) auto
    grid-template-rows repeat(3, 1fr)
    padding 0 $keypadPadding $keypadPadding
    position relative
    transform translateY(-($keyHeight))

    &-wrap
      background lighten($color, 25%)

    &-actions
      display grid
      grid-column 5
      grid-row 2 / -1
      grid-template-columns repeat(2, 1fr)
      grid-template-rows repeat(2, 1fr)
      padding-left $keypadPadding

    &-spacer
      grid-column 5
      grid-row 1

  &__mid
    height 40px
    background lighten($color, 5%)
    position relative

  &__key
    height 20px
    width 20px
    background lighten($color, 35%)
    border 2px solid lighten($color, 60%)
    border-radius 100%
    position absolute
    right 20px
    top 50%
    transform translate(0, -50%)

    &:after
      content ''
      height 2px
      width 10px
      position absolute
      top 50%
      left 50%
      background darken($color, 75%)
      transform translate(-50%, -50%) rotate(-35deg)


  &__receipt-feed
    background darken($color, 75%)
    content ''
    height 10px
    left 10px
    position absolute
    top 5px
    width 70px


  &__receipt
    background white
    top 100%
    left 0
    position absolute
    transition transform .25s .5s
    transform translateY(calc(var(--trans) * -16px))
    width 100%
    padding 0
    margin 0

  $receiptItemSize = 16px
  &__receipt-container
    bottom 5px
    position absolute
    left 10px
    width 50px
    height (3.5 * $receiptItemSize)
    overflow hidden

  &__receipt-item
    $itemColor = #dadfe1
    height $receiptItemSize
    width 100%
    position relative

    &:before
      content ''
      position absolute
      height 8px
      width 50%
      top 50%
      left 5px
      background $itemColor
      transform translateY(-50%)

    &:after
      content ''
      position absolute
      height 8px
      width 20%
      right 5px
      top 50%
      background $itemColor
      transform translateY(-50%)

  &__cash
    align-items center
    display grid
    grid-template-columns repeat(10,15px)
    grid-template-rows 1fr
    height 100%
    justify-content center
    left 50%
    line-height 50px
    position absolute
    top 0
    transform translate(-50%, -25%)
    width 100%

  &__float
    border 10px solid transparent
    border-bottom 0
    border-top 0
    display grid
    height 100%
    position absolute
    grid-template-columns repeat(20,15px)
    grid-template-rows 1fr
    overflow-x hidden
    top 0
    transform translateY(-25%)
    width 100%

  $noteDuration = 1s
  $noteDelay = .2s
  &__note
    animation-delay $noteDelay
    animation-duration $noteDuration
    animation-fill-mode backwards
    animation-timing-function cubic-bezier(0,.64,.25,1.01)
    font-size 2.5rem
    opacity 0
    transform-origin center
    transform translateY(calc(var(--y) * -1px)) rotate(calc(var(--rotation) * 1deg))
    overflow hidden

    &--float
      opacity 1
      transform rotate(90deg)

    &-wrap
      animation-delay $noteDelay
      animation-duration $noteDuration
      animation-fill-mode backwards
      animation-timing-function cubic-bezier(0,.64,.25,1.01)
      transform translateX(calc(var(--x) * 5px))

  &__drawer
    background black
    height 50px
    position relative
    transform translateY(-16px)

    &:before
      border 5px solid darken($color, 50%)
      content ''
      height 100%
      left 0
      position absolute
      top 0
      width 100%

    &--open
      .cash-register__drawer-front
        animation open .1s
        animation-fill-mode forwards

      .cash-register__note
        animation-name fly
      .cash-register__note-wrap
        animation-name fly-x



    &-front
      background darken($color, 25%)
      cursor pointer
      cursor -webkit-grab
      height 100%
      width 100%
      transform translate(0, 0)

      // handle
      &:before
        background lighten($color, 50%)
        border-radius 0
        content ''
        height 5px
        left 50%
        position absolute
        top 50%
        transform translate(-50%, -50%)
        width 40px

      // outline
      &:after
        border 4px solid darken($color, 50%)
        bottom 5px
        content ''
        left 5px
        position absolute
        right 5px
        top 5px

@keyframes fly
  0%
    opacity 1
    transform translateY(0) rotate(90deg)
  50%
    opacity 1

@keyframes fly-x
  from
    transform translateX(0)

@keyframes open
  95%
    transform translate(0, 30%)
  100%
    transform translate(0, 25%)
!

JS 

              
                const getRandom = () => Math.floor(Math.random() * 10)
const createNoteLocations = () => {
  const loc = []
  for (let i = 0; i < 10; i++) {
    loc.push([
      Math.floor(Math.random() * 100) - 50,
      Math.floor(Math.random() * 300) + 150,
      Math.floor(Math.random() * 90) - 90
    ])
  }
  return loc
}
const app = new Vue({
  el: '.cash-register',
  data: {
    subbing: false,
    lines: 0,
    receiptLines: 0,
    showLines: 0,
    amount: [0, 0, 0, 0],
    temp: [0, 0, 0, 0],
    notes: createNoteLocations(),
    tending: false,
    registerNoise: new Audio('https://freesound.org/data/previews/184/184438_850742-lq.mp3')
  },
  methods: {
    addToLine: function(e) {
      this.temp[e.target.getAttribute('data-amount-index')] = getRandom()
    },
    addReceiptItem: function(lines = 1) {
      this.amount = this.temp
      this.temp = [0, 0, 0, 0]
      this.lines = this.lines + 1
      this.receiptLines = this.receiptLines + lines
      this.$nextTick(() => {
        this.showLines = this.showLines + lines
      })
    },
    addLine: function() {
      this.addReceiptItem()
    },
    addSub: function() {
      this.addReceiptItem(2)
    },
    tend: function(e) {
      if ((this.tending === false && e.target.className.indexOf('front') !== -1) || (this.tending && e.target.className.indexOf('tend') !== -1)) return
      this.tending = !this.tending
      if (this.tending) {
        this.registerNoise.play()
      }
      if (this.tending === false)
        this.registerNoise.pause()
        this.registerNoise.currentTime = 0
        this.notes = createNoteLocations()
    }
  },
})
!
999px

Console