Благодаря !

package PB_More4;

import java.util.Scanner;

public class Logistics {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int cargo = Integer.parseInt(scanner.nextLine());
        double sum = 0;
        double ton = 0;
        int totalCargo = 0;
        double bus = 0;
        double truck = 0;
        double train = 0;
        for (int i = 1; i <= cargo; i++) {
            int tonnage = Integer.parseInt(scanner.nextLine());
            totalCargo += tonnage;
            if (tonnage <= 3) {
                ton += (tonnage * 200);
                bus += tonnage;
            } else if (tonnage > 4 && tonnage <= 11) {
                ton += (tonnage * 175);
                truck += tonnage;
            } else {
                ton += (tonnage * 120);
                train += tonnage;
            }
            sum = ton / totalCargo;
        }
                System.out.printf("%.2f%n", sum);
                System.out.printf("%.2f%%%n", bus / totalCargo * 100);
                System.out.printf("%.2f%%%n", truck / totalCargo * 100);
                System.out.printf("%.2f%%%n", train / totalCargo * 100);

    }
}

Помощ за тази задача моля!  60/100 дава!