Sunlo

The First Class is Discount which extends the Grocery Bill Class :- public class Discount extends GroceryBill{ boolean preffered = true ; private double d=0 ; GroceryBill gb = new GroceryBill() ; public Discount(Employee e ,boolean preffered) { } // disc count amount percent ; public void DiscountCount() { int a = 0 ; for(Item i : al) { if(i.getdiscount()>0) { a++ ; } } System.out.println("------------------------------------"); System.out.println("Total Discount Items : " + a); // System.out.println("------------------------------------"); } public void DiscountAmount() { for(Item i : al) { d+=(i.getprice()*i.getdiscount()) ; } System.out.println("------------------------------------"); System.out.printf("Total Discount Amount : %.2f", d); System.out.println(""); } public void DiscountPer() { double p=0 ,...