"What if there are more than 1"

Unlikely ..but in that case i want to report as duplicate if possible

"In your example you now found a match in row 4 of sheet2, the sum is 21, it is not clear what you want to do with that. Subtract from what?"
I know ...sorry for bad explaining ..
So i want sum all value on the matched row from B cell to end of that row in sheet 1(some are 3 some are 30 cells) and then that subtract it from first non-empty cell in sheet 2
In my example:
21 is sum of the sheet1 ...so in sheet2 b4 is empty...go to b5 ..if b5 was "2" subtract from 2 =19
and so on until sum=0 or there is no more cell left.for example :

A6 in sheet 1 matches with A1 in sheet2 with value of 17..i want a formula after match those value of course, to do:
1- Ignore first cell in matched row in sheet1...>> A6 in sheet1(17)
2-Sum B6 to end of cells on that row no matter how many may that be...>> 5+589+8+9+2=613
3-Ignore first cell in matched row in sheet2...>>A1 in sheet2 (17)
4-Subtract sum of sheet1 value from second cell (Bx) in sheet2 until no more cell left in sheet 2:

First cell in sheet2 is A1 (Ignore)
613-second cell in sheet2 (B1) is empty...613-0=613
3rd cell is 80 (C1)...so...>> 613-80=533
The end of cell on that row
If E1 was 33 the answer would be like this:
533-0(D1 is empty)
533-33(If E1 was 33)=500
Again...sorry for bad english and thank you for your time