Topanga Group began operations early in 2021. Inventory purchase information for the quarter ended March 31, 2021, for Topanga's only product is provided below. The unit costs include the cost of freight. The company uses a periodic inventory system to report inventory and cost of goods sold.

Topanga Group began operations early in 2021. Inventory purchase information for the quarter ended March 31,2021, for Topanga's only product is provided below. The unit costs include the cost of freight. The company uses a periodic inventory system to report inventory and cost of goods sold. Sales for the quarter, all at $100.00 per unit, totaled 150,000 units leaving 40,000 units on hand at the end of the quarter. Required: 1. Calculate the first quarter's ending inventory and cost of goods sold for the month using each of the following alternatives: a. FIFO, periodic system b. LIFO, periodic system c. Average cost, periodic system 2. Calculate Topanga's gross profit ratio for the first quarter using: a FIFO b. LIFO c. Average cost 3. Comment on the relative effect of each of the three inventory methods on the gross profit ratio