Can someone explain this exercise please. I know the answer but I don't understand it. Thx.

s co.has tie Tlg data related to an item of inventory: Inventory, March 1 Purchase, March 7 Purchase, March 16 Inventory, March 31 200 units @ $2.10 700 units $2.20 140 units@$2.25 260 units The value assigned to cost of goods sold if Niles uses FIFO isO 35 $1,696. $1,724. $552. $580 o o) 2002 10 $580