Adding two numbers in different tables in different pages .

Question

Hi am a new member here, am a c# asp.net developer and am not too strong in it yet.  can any one help me with a code that can add numbers from TWO different tables in two different pages, page (A) and page (B) and display the result in ,A, page.

example i have 200 in page A and 400 in page B and both are in different tables. Now i want to add the two numbers in A page and display it in A page.

Any idea please!