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When you post error messages, please copy the full text and paste it. It...

You need a reference to the class that has the methods to call the methods in the class.
What class has the methods you are trying to call?
Where in the code is there a reference to that class?
...

You need to have a reference to the class that the methods are in to be able to call the methods.
What class are the methods in?
How can the code get a reference to an instance of that class so it...

What class is the variable: supplies? Does it have those methods?

That says: You need to fix some compiler errors on line 76.

Can you post the contents of the console from when you execute the program that shows its input and output.

On windows: To copy the contents of the command prompt window:
Click on Icon in upper...