JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li class="cartprice">150.25</li>
    <li class="cartprice">25.36</li>
    <li class="cartprice">360.80</li>
    <li class="cartprice">1265.20</li>
    <li class="cartprice">26.50</li>
    <li class="cartprice">35.00</li>
    <li class="cartprice">1820.20</li>
</ul>

JavaScript

$(document).ready(function() {
    
    var arrTotals = [];
    var totalAmount = 0;
    
    $( ".cartprice" ).each(function( index ) {
         
        arrTotals.push = $(this).text(); 
        console.log(arrTotals);
   });
    
   for (var i = 0; i < arrTotals.length; i++) {
        totalAmount += arrTotals[i] << 0;
    }
        
    console.log('Total Amount: ' + totalAmount)   
    
});