Kindly explain what is wrong with my code ? I did not understand the 'applyStaffdiscount' part?


#1



Your bill is NaN


Replace this line with your code. 
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("Anushree",20);

var cashRegister = {
    total:0,
    lastTransactionAmount: 0,
    add: function(itemCost){
        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,discountPercent){
        this.total += discountPercent;
},
    
    
};

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
console.log('Your bill is '+cashRegister.total.toFixed(2));


#2

from the instructions:

Create a new method called applyStaffDiscount in the cashRegister object which accepts a parameter employee

it seems your method has two parameters instead of just the one.

you call your method here:

cashRegister.applyStaffDiscount(me);

which means your method parameter (employee) will now hold me, so you can access the discountPercent through your function parameter:

employee.discountPercent

in case of me, the discount is 20%. but if you want the percentage of something you can multiply it by 20/100

for example 20% of 250 is: 250 * (20 / 100) # answer: 50

so now we have done the math, we can subtract if from total:

this.total -= (this.total * (employee.discountPercent/100));

#3

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