// This program enhances our Receipt program using a cumulative sum.
import java.util.*;

public class Receipt2 {
   public static void main(String[] args) {
      Scanner console = new Scanner(System.in);
      int numPeople = getNumPeople(console);
      double subtotal = getSubtotal(console, numPeople);
      System.out.println();
      results(subtotal);
   }
   
   // Asks how many people are on this check.
   public static int getNumPeople(Scanner console) {
      System.out.print("How many people ate? ");
      return console.nextInt();
   
   }
   
   // Prompts for number of people and returns total meal subtotal.
   public static double getSubtotal(Scanner console, int numPeople) {
      double subtotal = 0.0; // cumulative sum
      for (int i = 1; i <= numPeople; i++) {
         System.out.print("Person #" + i +
                          ": How much did your dinner cost? ");
         double personCost = console.nextDouble();
         subtotal = subtotal + personCost; // add to sum
      }
      return subtotal;
   }
   
   // Calculates total owed, assuming 8% tax and 15% tip
   public static void results(double subtotal) {
      double tax = subtotal * .08;
      double tip = subtotal * .15;
      double total = subtotal + tax + tip;
      System.out.println("Subtotal: $" + subtotal);
      System.out.println("Tax: $" + tax);
      System.out.println("Tip: $" + tip);
      System.out.println("Total: $" + total);
   }
}