Assume that Cullumber Company has the following transactions in its first month of operations. Date Feb. 1 Feb. 10 Feb. 21 Feb. 28 Purchases 1,800 @ $3.80 6,200 @ $4.25 Sold 4.400 units 2.000 @ $4.65 Balance 1,800 units 8.000 units 3.600 units 5,600 units Cullumber uses a perpetual inventory system. (a) Compute cost of goods sold and ending inventory at February 28, assuming Cullumber uses the FIFO cost flow assumption.