5. Bleep Bleep


#1



Hi, could anyone kindly point out what I am doing wrong?


https://www.codecademy.com/courses/close-the-super-makert/0/5?curriculum_id=506324b3a7dffd00020bf661#


"Oops, try again. false"


var cashRegister = {
    total:0,
    //Dont forget to add your property
    lastTransactionAmount:0,
    add: function(itemCost) {
        this.total +=  itemCost;
        lastTransactionAmount = itemCost;
    },
    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;
    }
};

cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',1);
cashRegister.scan('chocolate',4);

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

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


#2

Inside a method, we need to refer to the owner, cashRegister which is denoted by this

this.lastTransactionAmound = ...

#3

Oh I see! Thank you very much mtf.


#4

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