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Whitby Inc. is a wholesaler that uses a perpetual inventory system. The company's accounting records provided the following transactions for Product B during the fiscal year ended on December 31, 2020. Sale Price Unit Cost $9 Date March 5 June 15 September 19 November 20 Transactions Purchase Sale Purchase Sale Units 19,000 10,000 8,000 16,000 $27 11 30 Additional information: The beginning inventory consisted of 7,000 units at a total cost of $56,000. All sales are made on account with credit terms, 2/10, n/30. Customers who purchased 10,000 units on November 20 paid the amount due within the discount period. All other customers paid their accounts receivable after the discount period. At the start of each question below, we indicate whether the First-in, First-out (FIFO) method or the Weighted Average Cost (WAC) method is used. If Whitby used a periodic inventory system instead of a perpetual system, which of the following statement would be correct? O A. If the FIFO method is used, the cost of sales under the periodic system would be different from the cost of sales under the perpetual system. o B. If the WAC method is used the cost of ending inventory at December 31, 2020 under the periodic system would be smaller than the cost of ending inventory under the perpetual system. OC. There is a need for a physical inventory count if the periodic system is used, but that is not necessary if the perpetual system is used. OD. Both inventory control systems are equally efficient in keeping track of inventory quantities and costs throughout the accounting period. . Assume that Whitby purchased goods for $2,000 from a local supplier on December 30, 2020 with terms F.O.B. shipping point. The merchandise had not arrived at the company's warehouse until January 2, 2021, and was not included in the inventory count at year end. What effect would this error have on the company's cost of sales and net earnings for 2020? The company's income tax rate is 40 percent. O A Understated by $2,000 Overstated by $1,200 OB. Overstated by $2,000 Understated by $1,200 OC. Understated by $2,000 Overstated by $800 OD. Overstated by $2,000 Understated by $800