how to check modify price entered by client

checkModifyPriceCount.js

// still working on optimization for this code  

    var addFloatsToArray = function (a) {
        var l = ([]);
        for (var i = 0; i < a.length; i++) {
            var f = a[i];
            {
                /* add */ (l.push(f) > 0);
            }
        }
        return l;
    };

    var getIncorrectCount = function () {
        var origItems = ["rice", "sugar", "wheat", "cheese"];
        var origPrices = [13.45, 78.78, 19.00, 442.45];
        var items = ["rice", "cheese"];
        var prices = [15.99, 400.79];
        var originalItems = (origItems.slice(0).slice(0));
        var originalPrices =addFloatsToArray(origPrices);
        var actualItems = (items.slice(0).slice(0));
        var actualPrices = addFloatsToArray(prices);
        var count = 0;
        for (var i = 0; i < actualItems.length; i++) {
            var aItems = actualItems[i];
            {
                var oi = originalItems.indexOf(aItems);
                var op = originalPrices[oi];
                var aii = actualItems.indexOf(aItems);
                if (op !== actualPrices[aii]) {
                    count++;
                }
            }
        }
        console.log(count);
    };
    
   
getIncorrectCount();

Javascript:- Michael is a shop owner who keeps a list of the name and sale price for each item in the store's inventory.
At each sale, his employees record the name and sale price of each item sold. Michael suspects his
manager, Alex, of embezzling money by modifying the sale price of some of the items. Write a program
that finds the number of times Alex recorded an incorrect sale price.