The following data represent the beginning inventory and, in order of occurrence, the purchases and sales of Blumen, Inc., for October 2019. Perpetual inventory system is used.

	Units	Unit Cost		Total Cost		Units Sold
Beginning Inventory on Oct. 1	30	$18		$ 540
Oct. 8, Purchased 20 units	20	19		380
Oct. 15, Purchased 40 units	40	20		800
Oct. 21, Sold 55 units						55
Oct. 28, Purchased 20 units	20	22		440

Required: Compute the amounts of cost of goods sold and ending inventory for the month of October using the following methods:

(a) First-in, first-out :

(b) Last-in, first-out:

(c) Weighted-average :