Beginning inventory... 140 units @$6.00=$840
Sales... 100 units @$15.00
Purchase... 300 units@$5.60=1680
Sales... 250 units@$15.00
Purchase... 100 units@$5.00=$500
Totals... 540 units $3020 350units
Determine cost assigned to ending inventory and to cost of goods sold using (a) specific identification (b) weighted average (c) FIFO (d) LIFO