The following lots of Commodity D were available for sale during the year. Use this information to answer the questions that follow, Beginning inventory 10 units at $65 First purchase 20 units at $68 Second purchase 30 units at $70 Third purchase 15 units at $75 The firm uses the periodic system, and there are 25 units of the commodity on hand at the end of the year. What is the ending inventory balance at the end of the year rounded to nearest dollar using the average cost method? O a. S1,510 O b.$1,750 OC $1,685 O d.$3,705