A company just starting business made the following three inventory purchases in February: Fob 1 Feb. 10 Feb. 28 300 units 400 units 90 units $1400 2800 810 $5010 On Feb. 15, there were 390 units sold. The company uses a perpetual inventory system. Using the weighted average cost formula, the balance in ending inventory on February 28 is O $2340. 0 $2670. 0 $2980. O $5010