Martinez Co. reported the following current-year data for its only product. The company uses a periodic inventory system, and its ending inventory consists of 405 units—135 from each of the last three purchases. Determine the cost assigned to ending inventory and to cost of goods sold using 

(a) Specific identification,

(b) Weighted average,

(c) FIFO,

(d) LIFO.

(Round per unit costs to three decimals, but inventory balances to the dollar.) Which method yields the highest net income?

Jan. Beginning inventory . . Mar7 Purchase 270 units @ $1.90 = $ 513 540 units $2.05I,107 Oct. 3 Prchae .. Dec. 19 Purchase ,230 units $2.603,198 390 units $2.701,053 $8,976 Totals 3,780 units