Information: QP Corp. sold 4,000 units of its product at $50 per unit in year 2013 and incurred operating expenses of $5 per unit in selling the units. It began the year with 700 units in inventory and made successive purchases of its product as follows. Required Prepare comparative income statements similar to Exhibit 6.8 for the three inventory costing methods of FIFO, LIFO, and weighted average. (Round all amounts to dollars and cents.) Include a detailed cost of goods sold section as part of each statement. The company uses a periodic inventory system, and its income tax rate is 40%