JSFiddle - React, Tailwind, and code Playground

by Aleksey Karagodnikov

HTML

<ul class="cart-list">
  <li id="cart-1">
    <div class="cart-hold">
      <div class="price-box">
        <span class="regular-price">
                <span class="price" id="price-1">1000</span>
        <span style="display:none" id="prices-1">1000</span> грн.
        </span>
      </div>
    </div>
  </li>
  <li id="cart-1">
    <div class="cart-hold">
      <div class="price-box">
        <span class="regular-price">
                <span class="price" id="price-1">1000</span>
        <span style="display:none" id="prices-1">1000</span> грн.
        </span>
      </div>
    </div>
  </li>
</ul>
<div id="res"></div>

JavaScript

var sum = 0;
$('.cart-list li').each(function() {
  sum += parseInt($('.price', this).text());
});
$('#res').html(sum);