MobileOperator.java

import java.util.Scanner;

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

        String contractTerm = scanner.nextLine();
        String contractType = scanner.nextLine();
        String mobileInternet = scanner.nextLine();
        int months = scanner.nextInt();

        double basePrice = 0;
        double internetPrice = 0;
        double totalDiscount = 1;

        switch (contractTerm) {
            case "one":
                switch (contractType) {
                    case "Small":
                        basePrice = 9.98;
                        break;
                    case "Middle":
                        basePrice = 18.99;
                        break;
                    case "Large":
                        basePrice = 25.98;
                        break;
                    case "ExtraLarge":
                        basePrice = 35.99;
                        break;
                }
                break;
            case "two":
                switch (contractType) {
                    case "Small":
                        basePrice = 8.58;
                        break;
                    case "Middle":
                        basePrice = 17.09;
                        break;
                    case "Large":
                        basePrice = 23.59;
                        break;
                    case "ExtraLarge":
                        basePrice = 31.79;
                        break;
                }
                totalDiscount -= 0.0375;
                break;
        }

        if (mobileInternet.equals("yes")) {
            if (basePrice <= 10) {
                internetPrice = 5.50;
            } else if (basePrice <= 30) {
                internetPrice = 4.35;
            } else {
                internetPrice = 3.85;
            }
        }

        double totalPrice = (basePrice + internetPrice) * months * totalDiscount;
        System.out.printf("%.2f lv.", totalPrice);
    }
}