How would I go about designing an application that you can enter the current year's sales by region (North,South,Ea st and West) and the projected increase(%) in sales for each region? Application should compute the following year's projected sales for each region.

I know I want 3 columns (current sales,projected increase & projected sales) and 4 rows for each region (in order to display 12 numbers) and 3 buttons (calculate projected...