#include <iostream>

using namespace std;

int main(){
    int quantity;
    double price, total;
{
    int count=0;
    int ext=0;
    int option=0;
    float price=0;
    int n1=0,n2=0,n3=0;
    while(ext>=0){
         cout<<"\n         MENU ";
      cout<<"\n1. ICU Monitor $159.99";
  cout<<"\n2. Get'er Done! Monitor $179.99";
  cout<<"\n3. Gamer's Delight Monitor $249.99";
  cout<<"\n4. Checkout";
    cout<<"\nEnter the option (1-4): ";
    cin>>option;
    if (option>0 && option <5)
        {
            count=count+1;
            if (option==1) {
            n1=n1+1;
               price= price +159.99;
            cout<<"Enter Item Quantity: ";
            cin>>quantity;
            price=quantity*price;}

            else if (option==2)
            {n2=n2+1;
                price= price +179.99;
            cout<<"Enter Item Quantity: ";
            cin>>quantity;
            price=quantity*price;}
            else if  (option==3)
            {n3=n3+1;
                 price= price +249.99;
            cout<<"Enter Item Quantity: ";
            cin>>quantity;
            price=quantity*price;}
            else if  (option==4)
            if (option == 4)
            break;

        }
        else
           cout<<"\nInvalid option " ;

        }

cout<<"\nTotal Cost of Monitors: $"<< price ;
cout<<"\nSales Tax (calculated at 6.5%): $"<<price*6.5/100;
cout<<"\nBalance Due: $" <<price +price*0.065;

    return 0;
}
}