Riverbed Corp uses a perpetual inventory system. Data for product E2-D2 include the purchases shown below.

Date		Number of Units		Unit Price
May 7		44		$15
July 28		33		20

On June 1, Riverbed Corp sold 22 units, and on August 27, 33 more units.

a/ Calculate the average cost per unit.

June 1 sale:

Aug 27 sale:

b/ Compute the cost of goods sold using FIFO, LIFO, and average cost.

Cost of goods sold