A company just starting a business purchased three inventory items at the following prices: March 2. 5150: March 7. $160; and March 15 $180. If the company sold one unit for 5230 on March 10 and one unit for $250 on March 20 and uses the average cost formula in a perpetual inventory system, what is the cost of ending inventory? Se ect one a. 180.00 b. 250.00 c. 163.34 d. 167.50