I want to add columns A2 through P2 until it equals the total in cell A1
Once the total would be met it would zero out the remainder of the cells.

For Example:

Cell A1 = 30
Cell A2 = 14
Cell B2 = 15
Cell C2 = 16
Cell D2 = 17 etc. (All the way to P2 which equals 29)

In the end I need:
Cell A3 to equal 14
Cell B3 to equal 29, (A2+B2) But we still need to add as we have not reached
30.
Cell C3 to equal 30, (A2+B2+C2) Because we only need 1 more to total to 30
Cells D4 to P4 to equal 0 as we have equaled or matched Cell A1 which is 30

I hope you can help!

Andman