# Building a Cash Register 7/7

#1

it looks like everyone did that exercise same way (with small differences in a mathematic method for applyStaffDiscount) and I'm pretty sure it's all correct - but the outcome is (same with guy named "permalink")
13.74

how can it be more than before discount (was 8.55)

codecademy let me pass it - and this is rad as well....

I'm not a mathematician but it should be 6.84 and it is some random 13.74

WTF?

``````function StaffMember(name,discountPercent){
this.name = name;
this.discountPercent = discountPercent;
}

var sally = new StaffMember("Sally",5);
var bob = new StaffMember("Bob",10);

// Create yourself again as 'me' with a staff discount of 20%
var me = new StaffMember("Jan",20);

var cashRegister = {
total:0,
lastTransactionAmount: 0,
this.total += (itemCost || 0);
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;
},
voidLastTransaction : function(){
this.total -= this.lastTransactionAmount;
this.lastTransactionAmount = 0;
},
// Create a new method applyStaffDiscount here
applyStaffDiscount: function(employee){
this.total = this.total - (this.total*(employee.discountPercent/100));}

};

cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',3);
// Apply your staff discount by passing the 'me' object
// to applyStaffDiscount
cashRegister.applyStaffDiscount(me);

// Show the total bill

#2

lets do the math, we buy 3 magazines (3 * 4.99), 1 egg (0.98) and 1 milk (1.23), which is a total of:

17.18

then we give 20% discount for employee, so that leaves us with 13.74

doing the math, i don't see a problem?

#3

nevermind - my mistake - in a previous version it was 3 x chocolate - and now it's 3 x magazine - which is more expensive and that's where supposed mistake was born - sorry for a topic -

#4

it's stupid anyways - why would codecademy change items in a middle of an exercise - it's a bug - and I've lost at least an hour trying to fugure out where is the mistake - code is quite long though

#5

btw thanks for quick reply, I figure that out in a same moment when you were writing your answer - but appreciated
cheers!

#6

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.