At the end of January, Higgins Data Systems had an inventory of 690 units, which cost $18 per unit to produce. During February the company produced 1,300 units at a cost of $21 per unit. If Higgins sold 1,600 units in February, what was its cost of goods sold? a. Assume average cost inventory accounting. (Do not round Intermedlate calculations. Round your answers to nearest whole dollar.) Cost of goods sold $ b. Assume FIFO inventory accounting. Cost of goods sold $