Mannisto Inc. uses the FIFO inventory cost flow assumption. In a year of rising costs and prices, the firm reported net income of $260,920 and average assets of $1.467.280. If Mannisto had used the LIFO cost flow assumption in the same year, its cost of goods sold would have been $45,520 more than under FIFO, and its average assets would have been $40,500 less than under FIFO. Required: a. Calculate the firm's ROI under each cost flow assumption (FIFO and LIFO). (Enter your answers as percentages rounded to 1 decimal place (i.e., 12.2%).) FIFO LIFO ROI b. Suppose that two years later costs and prices were falling. Under FIFO, net income and average assets were $311.450 and $1,813,630, respectively. If LIFO had been used through the years, Inventory values would have been 41,490 less than under FIFO, and current year cost of goods sold would have been $18,780 less than under FIFO. Calculate the firm's ROI under each cost flow assumption (FIFO and LIFO). (Enter your answers os percentages rounded to 1 decimal place (i.e., 12.2%).) FIFO LIFO ROI