P7-3 Evaluating Four Alternative Inventory Methods Based on Income and Cash Flow

Can some on eplease HELP~ I have no idea if the things I put in are right and how to figure out the rest.

Also PLEASE explain how you get # of units sold unders COGS because i dont get it and If I fail accounting my mom who is an accounting is gonna whip my arse.

UPDATE: THIS IS ALL THE INFORMATION THERE IS NO MISSING INFO

P7-3 Evaluating Four Alternative Inventory Methods Based on Income and Cash Flow LO7-2, 7-3 [The following information applies to the questions displayed below. At the end of January of the current year, the records of Donner Company showed the following for a particular item that sold at $15.20 per unit: Transactions Units Amount Inventory, January 1 Purchase, January 12 Purchase, January 26 Sale Sale 560 1,792 540 2,808 140 1,008 (420) (200) P7-3 Evaluating Four Alternative Inventory Methods Based on Income and Cash Flow LO7-2, 7-3 [The following information applies to the questions displayed below. At the end of January of the current year, the records of Donner Company showed the following for a particular item that sold at $15.20 per unit: Transactions Units Amount Inventory, January 1 Purchase, January 12 Purchase, January 26 Sale Sale 560 1,792 540 2,808 140 1,008 (420) (200)