Flounder Corporation uses the perpetual inventory system and had the following information available: Answer the following independent questions: (Round answers using average cost formula to 2 decimal places, e.g. 15.25.) (a) Assume that the company uses the FIFO cost formula. The cost of goods sold for the Jan. 21 sale was \$ (b) Assume that the company uses the average cost formula. The cost of goods sold for the Jan. 21 sale was \$ (c) Assume that the company uses the average cost formula. The value of the inventory after the Nov. 15 sale was $ (d) Assume that the company uses the FIFO cost formula. The value of the inventory after the Oct. 20 purchase is $