Mannisto Inc. uses the FIFO inventory cost flow assumption. In a year of rising costs and prices, the firm reported net income of $293,661 and average assets of $1,571720. If Mannisto had used the LIFO cost flow assumption in the same year its cost of goods sold would have been $47.270 more than under FIFO, and its average assets would have been $47,240 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 $347.211 and $1,832 490, respectively. W LIFO had been used through the years, Inventory values would have been $45.030 less than under FIFO and current year cost of goods sold would have been $21.443 less than under FIFO Calculate the firm's ROI under each cost flow assumption (FIFO and LIFO). (Enter your answers as percentages rounded to 1 decimal place (le, 12.2%)) FIFO LIFO ROY %