Harris Company uses a periodic inventory system and issues monthly financial statements. Use the following data from Harris Company's March inventory records to determine the weighted average unit cost under the Average Cost method (rounded). Units Unit Price Total Cost Balance, 3/1/2017 200 $5/unit $1,000 Purchase, 3/15/2017 100 $5.30/unit $530 Purchase, 3/28/2017 100 $5.50/unit $550 a. $5.20 per unit b. $5.27 per unit c. $5 d. More information is needed to answer the question.