During the year, a retailer made the following inventory purchases: 250 units at $7.40 each, 270 units at $8.50 each, and 200 at $10.00 each. At year end, there are 290 units remaining in inventory. The retailer used a periodic inventory system. Using the weighted average cost formula, the cost of ending inventory was: Select one: O a. $2,766 O b. $2,818 O c. $2,624 O d. $2,475 O e. $2,580 Next page