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HTML

              
                <h2>Add-ons</h2>

<input class="checkbox-btn" name="checkbox-collection" id="checkbox-1" type="checkbox" value="49">
<label class="checkbox-label" for="checkbox-1" tabindex="1">
    <span>
        White-labeled Domain
        <em>Use your own custom domain with SSL security included.</em>
    </span>
    <span>$49/mo</span>
</label>

<input class="checkbox-btn" name="checkbox-collection" id="checkbox-2" type="checkbox" value="49">
<label class="checkbox-label" for="checkbox-2" tabindex="2">
    <span>
        API Access
        <em>Make API calls to perform custom serving and account actions.</em>
    </span>
    <span>$49/mo</span>
</label>
<input class="checkbox-btn" name="checkbox-collection" id="checkbox-3" type="checkbox" value="349">
<label class="checkbox-label" for="checkbox-3" tabindex="3">
    <span>
        Priority Support
        <em>A dedicated account manager to assist your team with ongoing deployments.</em>
    </span>
    <span>$349/mo</span>
</label>

<div class="total-cost">
    <h2>Your Plan</h2>
    <div>
        <span>$</span>
        <span id="total-cost-inner">0</span>
        <input id="output" type="text" value="0" disabled/>
        <span>/mo</span>
    </div>
</div>
              
            
!

CSS

              
                /* Extra design fluff - not needed for main radio styling */
* {
    box-sizing: border-box;
}
body {
    background: lavender;
    border-top: 10px solid mediumpurple;
    font: 18px 'Avenir', 'Helvetica', sans-serif;
    margin: 0 auto;
    max-width: 800px;
    padding: 2rem;
}
h2 {
    margin-top: 0;
}

.checkbox-label {
    align-items: center;
    background-color: none;
    border: 1px solid lightgrey;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    font-weight: 600;
    justify-content: space-between;
    margin: 0 auto 10px;
    padding: 20px 20px 20px 70px;
    position: relative;
    transition: .3s ease all;
    width: 100%;
}
.checkbox-label span:last-child {
    padding: 0 0 0 20px;
}
.checkbox-label:hover {
    background-color: rgba(255,255,255,0.2);   
}
.checkbox-label:focus {
    outline: dotted;
}
.checkbox-label:before {
    background-repeat: no-repeat;
    background-position: center;
    background-size: 15px;
    border: 1px solid lightgrey;
    border-radius: 50%;
    content:'';
    height: 30px;
    left: 20px;
    position: absolute;
    top: calc(50% - 15px);
    transition: .3s ease background-color;
    width: 30px;
}
.checkbox-label:hover:before {
    background-image: 
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="23.571429" height="23.571429" viewBox="0.000000 -47.142857 23.571429 23.571429"><path fill="lightgrey" d="M23.571429 -36.964286L23.571429 -33.750000C23.571429 -33.303571 23.415179 -32.924107 23.102679 -32.611607C22.790179 -32.299107 22.410714 -32.142857 21.964286 -32.142857L15.000000 -32.142857L15.000000 -25.178571C15.000000 -24.732143 14.843750 -24.352679 14.531250 -24.040179C14.218750 -23.727679 13.839286 -23.571429 13.392857 -23.571429L10.178571 -23.571429C9.732143 -23.571429 9.352679 -23.727679 9.040179 -24.040179C8.727679 -24.352679 8.571429 -24.732143 8.571429 -25.178571L8.571429 -32.142857L1.607143 -32.142857C1.160714 -32.142857 0.781250 -32.299107 0.468750 -32.611607C0.156250 -32.924107 0.000000 -33.303571 0.000000 -33.750000L0.000000 -36.964286C0.000000 -37.410714 0.156250 -37.790179 0.468750 -38.102679C0.781250 -38.415179 1.160714 -38.571429 1.607143 -38.571429L8.571429 -38.571429L8.571429 -45.535714C8.571429 -45.982143 8.727679 -46.361607 9.040179 -46.674107C9.352679 -46.986607 9.732143 -47.142857 10.178571 -47.142857L13.392857 -47.142857C13.839286 -47.142857 14.218750 -46.986607 14.531250 -46.674107C14.843750 -46.361607 15.000000 -45.982143 15.000000 -45.535714L15.000000 -38.571429L21.964286 -38.571429C22.410714 -38.571429 22.790179 -38.415179 23.102679 -38.102679C23.415179 -37.790179 23.571429 -37.410714 23.571429 -36.964286ZM23.571429 -36.964286"></path></svg>');
}
.checkbox-label span {
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}
.checkbox-label span em {
    display: block;
    font-size: 80%;
    font-style: normal;
    font-weight: 400;
    line-height: 1.2;
}
.checkbox-btn {
    position: absolute;
    visibility: hidden;
}
.checkbox-btn:checked + .checkbox-label {
    background-color: white;
    border-color: mediumpurple;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.checkbox-btn:checked + .checkbox-label:before {
    background-color: mediumpurple;
    background-image: 
        url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="25.948661" height="19.888393" viewBox="2.025670 -40.011161 25.948661 19.888393"><path fill="white" d="M27.974330 -36.127232C27.974330 -35.680804 27.818080 -35.301339 27.505580 -34.988839L15.385045 -22.868304L13.108259 -20.591518C12.795759 -20.279018 12.416295 -20.122768 11.969866 -20.122768C11.523438 -20.122768 11.143973 -20.279018 10.831473 -20.591518L8.554688 -22.868304L2.494420 -28.928571C2.181920 -29.241071 2.025670 -29.620536 2.025670 -30.066964C2.025670 -30.513393 2.181920 -30.892857 2.494420 -31.205357L4.771205 -33.482143C5.083705 -33.794643 5.463170 -33.950893 5.909598 -33.950893C6.356027 -33.950893 6.735491 -33.794643 7.047991 -33.482143L11.969866 -28.543527L22.952009 -39.542411C23.264509 -39.854911 23.643973 -40.011161 24.090402 -40.011161C24.536830 -40.011161 24.916295 -39.854911 25.228795 -39.542411L27.505580 -37.265625C27.818080 -36.953125 27.974330 -36.573661 27.974330 -36.127232ZM27.974330 -36.127232"></path></svg>');
    border-color: mediumpurple;
}

.total-cost {
    align-items: baseline;
    border-top: 1px solid lightgrey;
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding: 40px 20px 0;
}
.total-cost div {
    align-items: baseline;
    display: flex;
}
.total-cost span:nth-child(1) {
    align-self: flex-start;
    padding-top: 5px;
}
.total-cost span:nth-child(2) {
    font-size: 32px;
    font-weight: bold;
}
.total-cost input {
    display: none;
}

@media(max-width:480px) {
    .checkbox-label {
        align-items: flex-start;
        flex-direction: column;
        flex-wrap: wrap;
    }
    .checkbox-label span:last-child {
        padding: 10px 0 0 0;
    }
}
              
            
!

JS

              
                window.onload=function(){
var inputs = document.getElementsByClassName('checkbox-btn')

 for (var i=0; i < inputs.length; i++) {
    inputs[i].onchange = function() {
        var add = this.value * (this.checked ? 1 : -1);
        var new_total = parseFloat(document.getElementById('output').value);
        var updated_total = document.getElementById('output').value=new_total + add
        document.getElementById('total-cost-inner').innerHTML = updated_total;
    }
  }
}
              
            
!
999px

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