Why is this false?


#1


What is making it false??

Oops, try again. false

var cashRegister = {
    total:0,
    lastTransactionAmount: 0,
    //Dont forget to add your property
    add: function(itemCost) {
        this.total +=  itemCost
        this.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
    voidLastTransactionAmount: 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.voidLastTransactionAmount()
cashRegister.scan('chocolate', 3)

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


#2

@marblexake

Have a close look at

//Add the voidLastTransaction Method here


#3

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