3 Errors in Java code. Please help.?

Hi I need some help with this code please: import java.io.*;

import javax.swing.JOptionPane;

import java.text.DecimalFormat;

public class Tuition

{

public static void main(String[] args)

{

//Declare Variables

int hours;

double fees, rate, tuition;

//Call Methods

displayWelcome();

hours = getHours();

rate = getRate(hours);

tuition = calcTuition(hours, rate);

fees = calcFees(tuition);

displayTotal(tuition + fees);

}

public static void displayWelcome()

{

System.out.println("Welcome to the Tuition and Fees Calculator");

}

public static int getHours()

{

//Declare Variables

BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

String strHours;

int hours = 0;

try

{

//Prompt User for input

System.out.println("\t\tEnter total number of hours used by students");

hours = dataIn.readLine();

hours = Integer.parseInt(strHours);

}

catch(NumberFormatException e)

{

System.out.println("Please input whole numbers");

}

return hours;

}

public static double getRate(int hours)

{

if (hours > 15)

{

System.out.println("\t\tCalculate rate per credit hour");

}

else

if(hours < 15)

{

System.out.println("Credit hours are inaccurate");

}

return Rate;

}

public static double calcTuition(int hours, double rate)

{

//Accept two values

rate = rate * hours;

return Tuition;

}

public static double calcFees(double tuition)

{

//Accept double Value

double fees;

fees = tuition * 0.8;

return fees;

}

public static void displayTotal(double total)

{

//Construct DecimalFormat pattern for currency

DecimalFormat twoDigits = new DecimalFormat("$000.00");

double fees;

double tuition;

System.out.println("Your total is: "+ tuition+".");

}

}

The Errors are: java:49: error: incompatible types

hours = dataIn.readLine();

java:74: error: cannot find symbol

return Rate;

java:82: error: cannot find symbol

return Tuition;

In the dataIn.readLine statement, I have hours twice because I dont know what else to use. I have tried all the others like rate, tuition etc, but cant come right there. Also the two return statements; rate and tuition are incorrect. Could someone please assist me here.

Thank You. God Bless :-)