A firm has two production runs a year to create inventory for sale in the first run, 150,000 units are made at a unit cost of 54. in the second run, 150,000 units are made at a unit cost of $4.25. Over the course of the year, the firm sells 225,000 units. Under FIFO the ending inventory is: O A $300,000 OB. $318.750 C.5918.750 D. 5637.500