Self Check 4.1 & 4.2

Number 12

import java.util.*;
public class Pg301_14
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);
        System.out.println("How much will John be spending?");
        double amount = console.nextDouble();
        System.out.println("How much will Jane be spending?");
        double amount = console.nextDouble;
        Calculate( amount1, amount2);
        return();
    }
    public static double Calculate(double x, double y)
    int numBills = (int) (x/20.0);
    if (numBills * 20.0 < x)
    {
        numBills++
    }
    int numBills2 = (int) (x/20.0);
    if (numBills2 * 20.0 < x)
    {
        numBills2++
    }
}