How to add bill in do while loop? - c++

Question

How can I add these bills to total bill in c++, It is printing the bills of every product separately how to add these to total bill
#include<iostream>
using namespace std;
int main(){
cout<<"Welcome to ABC SuperMarket\n";
char cont;
cont = 'Y';
do{
cout<<"\nlist of Products\n ******\n1.Apple = $0.25\n2.Banana = $0.30\n3.Milk = $3\n4.Eggs = $0.50\n5.Bread = $3\n6.Chicken breasts = $5\n7.Spinach = $0.50\n8.Ground beef = $7\n";
int basket,qty;
float bill;
cout<<"\nSelect the product number you want to add in your basket. ";
cin>>basket;
switch(basket)
{
case 1:
cout<<"How many apples do you want? ";
cin>>qty;
bill = 0.25 * qty;
cout<<"$"<<bill;
break;
case 2:
cout<<"How many bananas do you want? ";
cin>>qty;
bill = 0.30 * qty;
cout<<"$"<<bill;
break;
case 3:
cout<<"How many cartons of milk do you want? ";
cin>>qty;
bill = 3 * qty;
cout<<"$"<<bill;
break;
case 4:
cout<<"How many eggs do you want? ";
cin>>qty;
bill = 0.50 * qty;
cout<<"$"<<bill;
break;
case 5:
cout<<"How many bread do you want? ";
cin>>qty;
bill = 3 * qty;
cout<<"$"<<bill;
break;
case 6:
cout<<"How many pieces of chicken breast do you want? ";
cin>>qty;
bill = 5 * qty;
cout<<"$"<<bill;
break;
case 7:
cout<<"How many spinach do you want? ";
cin>>qty;
bill = 0.50 * qty;
cout<<"$"<<bill;
break;
case 8:
cout<<"How much ground beef do you want? ";
cin>>qty;
bill = 7 * qty;
cout<<"$"<<bill;
break;
default:
cout<<"Invalid input";
}
cout<<"\n\nDo you want to add more items in your basket? Type Y or N. ";
cin>>cont;
} while (cont == 'Y');
return 0;
}
How to add these bills in total bill at the end?
How can I add these bills to total bill in c++,