Codecademy export

script.js

var cashRegister = {
    total:0,
    lastTransactionAmount:0,
    //Dont forget to add your property
    add: function(itemCost) {
        this.lastTransactionAmount = itemCost;
        this.total += this.lastTransactionAmount;
    },
    scan: function(item,quantity) {
        switch (item) {
        case "eggs": this.add(0.98 * quantity); break;
        case "milk": this.add(1.23 * quantity); break;
        case "magazine": this.add(4.99 * quantity); break;
        case "chocolate": this.add(0.45 * quantity); break;
        }
        return true;
    },
    //Add the voidLastTransaction Method here
    voidLastTransaction: function () {
        this.total -= this.lastTransactionAmount;
        this.lastTransactionAmount = 0;
        }
    
};

cashRegister.scan('eggs',3);
cashRegister.scan('milk',3);
cashRegister.scan('magazine',3);
cashRegister.scan('chocolate',3);
//Void the last transaction and then add 3 instead
cashRegister.voidLastTransaction();

//Show the total bill
console.log('Your bill is '+cashRegister.total);