Assume that a Goodyear Tire store completed the following perpetual inventory transactions for a line of tires. Beginning inventory 20 tires @ $ 60 Purchase 8 tires @ 75 30 Sale 15 tires @ 110 REQUIREMENTS: Compute cost of goods sold and gross profit under (a) LIFO, and (b) Average cost EXTRA CREDIT: Inventory Multi-step income statement Flrst-ln, First out inventory costing method Lower-of-cost-or-market (LCM) rule