Piccolo esempio che spero ti sia utile, ciao.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.ProductMeta__PriceList {
display: flex;
flex-direction: column;
}
</style>
</head>
<body>
<div class="ProductMeta__PriceList Heading">
<span class="ProductMeta__Price Price Text--subdued u-h4">€1.000</span>
<span class="ProductMeta__Price Price Text--subdued u-h4">€2.500</span>
<span class="ProductMeta__Price Price Text--subdued u-h4">€3.500</span>
</div>
<span id="showTotal">Totale: €-</span>
<button id="calcTotal">Calc</button>
<script>
const productsPrice = document.querySelectorAll('.ProductMeta__Price')
const showTotal = document.getElementById('showTotal')
const calTotal = document.getElementById('calcTotal')
function fnTotal() {
const euroCurrency = new Intl.NumberFormat('it-IT')
let tot = Array.from(productsPrice).reduce((a, v) => {
return a + (+v.textContent.replace(/\.|\€/g, ''))
}, 0)
showTotal.textContent = `Totale: €${euroCurrency.format(tot)}`
}
calTotal.addEventListener('click', fnTotal)
</script>
</body>
</html>