4. A company made the following merchandise purchases and sales during the month of July: July 1 Purchased 400 Units at $15 each July 5 Purchased 250 Units at $20 each July 10 Sold 300 $45 each July 11 Purchased 100 Units at $25 each July 10 Sold 400 $55 each July 12 Purchased 200 $30 each Units at Units at Units at There was no beginning inventory. Compute the cost and units in ending inventory using: 1. First in, First out (FIFO) 2. Last in, First out (LIFO) 3. Weighted Average