Perpectual Inventory using FIFO. Accounting help!?

• storage units phoenix az
• transaction processing system

No matter what I insert, it comes out wrong! I just completed another problem similar with no problems at all. I just can't figure this one out. Please help =/

$Inventory:

Aug. 1 775 units at $44

Purchases:

Aug. 10 360 units at $45

Aug. 20 600 units at $48

Sales:

Aug. 12 600 units

Aug. 14 415 units

Aug. 31 500 units

This is what i completed. I circled the problem area.

http://i878.photobucket.com/albums/ab342…

Additional Details

just_the_facts_ma'am thanks so much its correct! I was stressing over that problem! Lol thanks again.! 10points for you!

Perpectual Inventory using FIFO. Accounting help!?