(Ratio analysis) Assuming a 360-day year, calculate what the average investment in inventory would be for a firm, given the following information in each case

.a. The firm has sales of $500,000, a gross profit margin of 15 percent, and an inventory turnover ratio of 5.

b. The firm has a cost-of-goods-sold figure of $440,000 and an average age of inventory of 60 days

.c. The firm has a cost-of-goods-sold figure of $1.2 million and an inventory turnover rate of 6.

d. The firm has a sales figure of $23 million, a gross profit margin of 17 percent, and an average age of inventory of 25 days.