Help with a quick Java code debugging exercise.

Hello, all. I'm in a Java Programming I class with a Debugging Exercise 3-1. Right now, we're learning about methods, returns, classes, objects, etc. I have tried multiple ways to get this to execute properly, but I can't figure it out. I've played with the code so much that I don't remember any specific problems that I've had. 

This is the original code:

// This class calculates a waitperson's tip as 15% of the bill
public class DebugThree1
{
   public static void main(String args[])
   {
      double myCheck = 50.00;
      double yourCheck = 19.95;
      System.out.println("Tips are");
      calcTip(myCheck);
      calctip(yourcheck);
    }
    public void calcTip(double bill)
    {
       final double RATE = 0.15;
       double tip;
       tip = check * RATE;
       System.out.println("The tip should be at least " + tip);
    }
}

The current error messages say:

DebugThree1.java:9: error: non-static method calcTip(double) cannot be referenced from a static context
      calcTip(myCheck);
      ^
DebugThree1.java:10: error: cannot find symbol
      calctip(yourcheck);
              ^
  symbol:   variable yourcheck
  location: class DebugThree1
DebugThree1.java:16: error: cannot find symbol
       tip = check * RATE;
             ^
  symbol:   variable check
  location: class DebugThree1
3 errors
Error: Could not find or load main class DebugThree1

I have noticed the small typos included.