The following information relates to the inventory of Margaret's Megamart Ltd during December.

		Units		Unit cost		Total cost
1/12 Beginning inventory		550		$3		$1,650
10/12 Purchase (excluding GST)		390		3.15		1,229
15/12 Purchase (excluding GST)		230		3.30		759
23/12 Purchase (excluding GST)		390		3.50		1,365
Totals		1,560				$5,003

Margaret's Megamart Ltd uses the periodic inventory system. During the month, 1,010 units were sold for a total of $4,310 plus GST. A physical count on 31 December verified that 550 units were on hand.

Prepare an income statement down to gross profit for December, using each of the following costing methods: (Round answers to 0 decimal places, e.g. 5,275.)

1.		specific identification, assuming that 310 units were sold from the beginning inventory, 310 units from the first purchase, 160 units from the 15 December purchase, and the remainder from the 23 December purchase
2.		FIFO
3.		LIFO
4.		weighted average.