JSFiddle - React, Tailwind, and code Playground

HTML

<input type="hidden" data-price="10.99" class="some_price">
<input type="hidden" data-price="18.49" class="some_price">

JavaScript

var total = 0;
$('.some_price').each(function(){
    var price = $(this).data('price');
    total += parseFloat(price)
});
alert(total);