import java.util.*;
import java.io.*;

public class CableCompanyBilling
{
    static Scanner console = new Scanner(System.in);

        //Named constants - residential customers
    static final double R_BILL_PROC_FEE = 4.50;
    static final double R_BASIC_SERV_COST = 20.50;
    static final double R_COST_PREM_CHANNEL = 7.50;

      //Named constants - business customers
    static final double B_BILL_PROC_FEE = 15.00;
    static final double B_BASIC_SERV_COST = 75.00;
    static final double B_BASIC_CONN_COST = 5.00;
    static final double B_COST_PREM_CHANNEL = 50.00;

    public static void main(String[] args)
    {
          //Variable declaration
        int accountNumber;
        char customerType;
        int noOfPremChannels;
        int noOfBasicServConn;
        double amountDue;

        System.out.println("This program computes "
                         + "a cable bill.");

        System.out.print("Enter the account "
                       + "number: ");                //Step 1
        accountNumber = console.nextInt();           //Step 2
        System.out.println();

        System.out.print("Enter the customer type: "
                       + "R or r (Residential), "
                       + "B or b(Business): ");      //Step 3
        if (customerType == 'R' || customerType == 'r')
        {
          System.out.println(residentcust(amountDue));
        }
        else if (customerType == 'B' || customerType == 'b'){
          System.out.println(businesscust(amountDue));
        }

 public static double residentcust(char r)
    {
      int noOfPremChannels;
      double amountDue;
      int accountNumber;
            System.out.print("Enter the number of "
                           + "premium channels: ");  //Step 5a
            noOfPremChannels = console.nextInt();    //Step 5b
            System.out.println();

            amountDue = R_BILL_PROC_FEE +            //Step 5c
                        R_BASIC_SERV_COST +
                        noOfPremChannels *
                        R_COST_PREM_CHANNEL;

            System.out.println("Account number = "
                              + accountNumber);      //Step 5d
            System.out.printf("Amount due = $%.2f %n",
                              amountDue);            //Step 5e
            return "";

 }

    public static double businesscust(double b)
    {
     int noOfPremChannels;
      double amountDue;
      int accountNumber;
      int noOfBasicServConn;
            System.out.print("Enter the number of "
                           + "basic service "
                           + "connections: ");       //Step 6a
            noOfBasicServConn = console.nextInt();   //Step 6b
            System.out.println();

            System.out.print("Enter the number of "
                           + "premium channels: ");  //Step 6c
            noOfPremChannels = console.nextInt();    //Step 6d
            System.out.println();

            if (noOfBasicServConn <= 10)             //Step 6e
                amountDue = B_BILL_PROC_FEE +
                            B_BASIC_SERV_COST +
                            noOfPremChannels *
                            B_COST_PREM_CHANNEL;
            else
                amountDue = B_BILL_PROC_FEE +
                            B_BASIC_SERV_COST +
                            (noOfBasicServConn - 10) *
                            B_BASIC_CONN_COST +
                            noOfPremChannels *
                            B_COST_PREM_CHANNEL;

            System.out.println("Account number = "
                              + accountNumber);      //Step 6f
            System.out.printf("Amount due = $%.2f %n",
                               amountDue);           //Step 6g
            return "";
    }
    }
    }