Mannisto Inc. uses the FIFO inventory cost flow assumption. In a year of rising costs and prices, the firm reported net income of $249,703 and average assets of $1,565,670. If Mannisto had used the LIFO cost flow assumption in the same year, its cost of goods sold would have been $37,940 more than under FIFO, and its average assets would have been $30,900 less than under FIFO Required: a. 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 % b. Suppose that two years later costs and prices were falling Under FIFO, net income and average assets were $298,423 and $1,909,500, respectively. If LIFO had been used through the years, inventory values would have been $44,670 less than under FIFO and current year cost of goods sold would have been $24.873 less than under FIFO. Calculate the firm's ROI under each cost flow assumption (FIFO and LIFO). (Enter your answers as percenteges rounded to 1 decimal place (i.e., 12.2 % ) .) FIFO LIFO RO