Ace Systems, Inc. uses a perpetual inventory system. The company's beginning inventory of a particular product and its purchases during the month of January were as follows: On 28 January, Ace Systems sells 18 units. A Refer to above data. Assuming that Ace Systems uses the FIFO cost flow assumption, the cost of goods sold on 28 January is: ab$509$341cd$499Someotheramount. B Refer to above data. Assuming that Ace Systems uses the weighted average cost flow assumption, the cost of goods sold to be recorded at 28 January is: ab$504.$336.cd$499.Someotheramount. C Refer to above data. Assuming that Ace Systems uses the LIFO cost flow assumption, the 12 units of this product in inventory at 31 January have a total cost of: a $499 c $509 b $331 d Some other amount