Simple Operations Trekking Equipement

import java.util.Scanner;

public class AlpineEquipment {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int carabiner = 36;
        double tire = 3.60;
        double pikel = 19.80;

        int alpineCount = Integer.parseInt(scanner.nextLine());
        int carabinerCount = Integer.parseInt(scanner.nextLine());
        int tireCount = Integer.parseInt(scanner.nextLine());
        int pikelCount = Integer.parseInt(scanner.nextLine());

        int alpineSum = alpineCount + 1 - 1;
        int carabinerPrice = carabiner * carabinerCount;
        double tirePrice = tireCount * tire;
        double pikelPrice = pikelCount * pikel;

        double singleAlpinePrice = carabinerPrice + tirePrice + pikelPrice;
        double allAlpinePrice = singleAlpinePrice * alpineSum;
        double taxPay = allAlpinePrice + (allAlpinePrice * 0.20);

        System.out.printf("%.2f",taxPay);

    }
}