Data calculation!

Question

Hello, help please advice!
I have a certain nomenenclature and I need to work with it by changing its values.
For example: to left was the right I entered their number and the total amount was immediately updated depending on the number a particular product.
Please help me catch the essence of how it should be)
Thanks in advance!

Answer 1

Can you show us a example ?
Do you really need to use C# ? It seems more suitable for a spreadsheet.

Answer 2

I have such a table in Excel, and I like how it works! but I'm starting to learn c # and I would like to make a window application with these features, even if it is not so necessary, but for the sake of knowledge, I will try

Answer 3

I understand, good reason.
Could you show a example with data ?