Vending Machine

package com.company;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String input = scanner.nextLine();
        double sum = 0;
        double coin = 0;
        while (!input.equals("Start")) {
            if (input.equals("0.1")) {
                coin = Double.parseDouble(input);
                sum += coin;
            } else if (input.equals("0.2")) {
                coin = Double.parseDouble(input);
                sum += coin;
            } else if (input.equals("0.5")) {
                coin = Double.parseDouble(input);
                sum += coin;
            } else if (input.equals("1")) {
                coin = Double.parseDouble(input);
                sum += coin;
            } else if (input.equals("2")) {
                coin = Double.parseDouble(input);
                sum += coin;
            } else {
                coin = Double.parseDouble(input);
                System.out.printf("Cannot accept %.2f%n", coin);
            }
            input = scanner.nextLine();
        }
        String product = scanner.nextLine();
        double price = 0;
        while (!product.equals("End")) {
            if (product.equals("Nuts")) {
                price = 2;
            } else if (product.equals("Water")) {
                price = 0.7;
            } else if (product.equals("Crisps")) {
                price = 1.5;
            } else if (product.equals("Soda")) {
                price = 0.8;
            } else if (product.equals("Coke")) {
                price = 1.0;
            } else {
                System.out.println("Invalid product");
                sum += price;
            }
            sum -= price;
            if (sum >= 0) {
                System.out.printf("Purchased %s%n", product);
            } else {
                System.out.println("Sorry, not enough money");
                sum += price;
            }
            product = scanner.nextLine();
        }
        System.out.printf("Change: %.2f", sum);
    }
}