Help please!

More info May 1 Beginning merchandise inventory May 11 Purchase May 23 Sale May 26 Purchase May 29 Sale - 20 tires @ $66 each 8 tires @ $73 each 15 tires @ $87 each 13 tires @ $84 each 15 tires @ $87 each X Requirements 1. Compute cost of goods sold and gross profit using the FIFO inventory costing method. 2. Compute cost of goods sold and gross profit using the LIFO inventory costing method. 3. Compute cost of goods sold and gross profit using the weighted-average inventory costing method. (Round weighted-average cost per unit to the nearest cent and all other amounts to the nearest dollar.) 4. Which method results in the largest gross profit, and why