start calculation and some tips (original) (raw)

Hi,
I Know this is too much to ask, >_<
I’m newbie in java ,,,,
And I need help in Java; I’m done with the design which it’s an application
Its 4 Classes + application, its Pizza order, I use several components...
The problem is I don’t know how I can do the calculation…!!!

This is the interface for my application,

The first tab is about the Pizza Size, and the Topping!!

The 2nd tab is about Drinks and the text boxes is for the Quantity

The Side Dishes is the same the text boxes is for the Quantity

The Las Tab is for the information and calculation

Were each tab has the total Price and finally all added to get the final total,
The customer information is to get and alert display the total + customer name.

I just need guide and tips or how can I start making the calculation
The code is in the here and thanks in advance ..!!!!
http://www.mediafire.com/?du10eltogt4