practical 3 part b question 5

Class item
{
private decimal unitPrice;
private int quantity;

public int Quantity
{
get{return quantity;}
set{quantity= value;}
}

public decimal CalculateCost()
{
return unitPrice*quantity
}
}

class test{
//mainmethod
Item item = new item();
item.Quantity = 5;
item.UnitPrice = 12.50;
item.CalculateCost(); //display the cost
}