6-Muscat Company uses the periodic inventory system to account for inventories. Information related to Muscat Company's inventory for the month of January 2020 is given as follows: Un Per unit price Total OMR 5.00 200 Balance, 11/20 100 5.80 Purchase, 1/15/2020 Purchase, 128/2020 100 5.50 The physical inventory count on January 31 shows 120 units are on hand. Using the FIFO method what is the cost of goods sold? Select one a. None of the answers are correct b. OMR 656 c. OMR 600 d. OMR 1.424 e. OMR 520