Mannisto Inc. uses the FIFO Inventory cost flow assumption. In a year of rising costs and prices, the firm reported net income of $292,738 and average assets of $1,480,110. if Mannisto had used the LIFO cost flow assumption in the same year, its cost of goods sold would have been $40,290 more than under FIFO, and its average assets would have been $42,070 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%).) Answer is complete but not entirely correct. FIFO LIFO 19.2 170 % ROI % b. Suppose that two years later costs and prices were falling. Under FIFO, net income and average assets were $334,998 and $1,807,660, respectively. If LIFO had been used through the years. Inventory values would have been $41,130 less than under FIFO, and current year cost of goods sold would have been $16,456 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 (.e., 12.2%) FIFO LIFO ROI % %