Problem! Firm A is a merchandiser selling small devices. At the beginning of October, it has 400 devices in the warehouse. Each cost is 2.5 dollars. On Oct. 5*, the firm purchased 300 new devices with a price of 3 dollars each. On Oct.10, the firm sold 500 devices. On Oct.155, the firm purchased 400 new devices with a price of 3.5 dollars each. On Oct.20h, the firm sold 200 devices. On Oct.25h, the firm sold 300 devices. On Oct. 306, the firm purchased 250 new devices with a price of 4 dollars each. Please determine the cost of merchandise sold during October and show the calculation process. Use LIFO Perpetual method