Опитах всичко да променя и в крайна сметка винаги дава 90/100,ето и кода,ако някой може да ми обясни защо не става работата ще съм благодарен.

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double moneyNeeded=Double.parseDouble(scanner.nextLine());
        double fictionBooks=Double.parseDouble(scanner.nextLine());
        double thrillerBooks=Double.parseDouble(scanner.nextLine());
        double romanceBooks=Double.parseDouble(scanner.nextLine());
        double fictionBooksPrice=14.90;
        double thrillerBooksPrice=9.80;
        double romanceBooksPrice=4.30;
        double totalSum=(thrillerBooks*thrillerBooksPrice)+(fictionBooks*fictionBooksPrice)+(romanceBooks*romanceBooksPrice);
        double totalsumDDS=totalSum-totalSum*0.20;
        if (moneyNeeded<0){
            System.exit(0);

        }
        if (totalSum>=moneyNeeded){
            double totalBonus= totalsumDDS-moneyNeeded;
            double bonus=Math.floor(totalBonus-totalBonus*0.90);
            int i=(int)bonus;
            double donationBonus=totalBonus-bonus;
            double totalDonated=moneyNeeded+donationBonus;
            System.out.printf("%.2f leva donated.%n",totalDonated);
            System.out.printf("Sellers will receive %d leva.",(i));
        }else{
            System.out.printf("%.2f money needed.",moneyNeeded-totalsumDDS );
        }
    }
}