JSFiddle - React, Tailwind, and code Playground

HTML

<input name="one" value="$70.45" />
<input name="two" value="$45" /v

JavaScript

var inputs = document.querySelectorAll('input');
const getNumber = (val) => Number(val.match(/[\d\.]+/));
var sum = getNumber(inputs[0].value) + getNumber(inputs[1].value);
console.log(sum)