JSFiddle - React, Tailwind, and code Playground
by Andrey Gershun
HTML
<script src="http://alasql.org/console/alasql.min.js"></script>
<span id="res"></span>
JavaScript
var data = [{ dep: 'A', qt: 10, price: 5},
{ dep: 'A', qt: 5, price: 2.30 },
{ dep: 'B', qt: 3, price: 2.20 },
{ dep: 'C', qt: 1, price: 4 },
{ dep: 'C', qt: 4, price: 10 }];
var res = alasql('SELECT dep, SUM(qt) AS qt, SUM(qt*price) AS amt, AGGR(amt/qt) AS price FROM ? GROUP BY dep',[data]);
document.getElementById("res").textContent = JSON.stringify(res);