S6-3. (Learning Objective 2: Compare income tax effects of the inventory costing methods) This exercise should be used in conjunction with S6-2. City Copy Center is a corporation subject to a 40% income tax. Compute City Copy Center's income tax expense under the average, FIFO, and LIFO inventory costing methods. Which method would you select to (a) maximize income before tax and (b) minimize income tax expense? S6-3. (Learning Objective 2: Compare income tax effects of the inventory costing methods) This exercise should be used in conjunction with S6-2. City Copy Center is a corporation subject to a 40% income tax. Compute City Copy Center's income tax expense under the average, FIFO, and LIFO inventory costing methods. Which method would you select to (a) maximize income before tax and (b) minimize income tax expense