Paste this script into the console of an Amazon List view or add it to a plugin like cjs to get the sum of all items in the list

amazonlistsum.js

var a = document.querySelectorAll(".a-price-whole");
var f = document.querySelectorAll(".a-price-fraction");
var s = 0;

for (var i = 0; i < a.length; i++) {
	s = parseInt(a[i].innerText.substring(0, a[i].innerText.length - 1)) + s;
	s = (parseInt(f[i].innerText) / 100) + s
}

console.log("Your List Price: " + s + " Euro");