Periodic Inventory by Three Methods LIFO opposite of FIFO

The units of an item available for sale during the year were as follows:

Jan. 1	Inventory	19 units at $29	551
Feb. 17	Purchase	16 units at $30	480
Jul. 21	Purchase	10 units at $33	330
Nov. 23	Purchase	13 units at $34	442
		58	1803

There are 35 units of the item in the physical inventory at December 31. The periodic inventory system is used. Round average unit cost to one decimal and final answers to the nearest whole dollar, if required.

The homework says my first answer is wrong

1. Determine the inventory cost by the first-in, first-out method. 13*34 =(442) + (22)*33= (726) = 1168
2. Determine the inventory cost by the last-in, first-out method. 19*29= 551 + (35-19)*30 = (480) =1031
3. Determine the inventory cost by the weighted average cost method. 1803/58 =31 31*35 = 1088