the following relates to the activities of a pharmaceutical company (amounts in millions):
Year1 Year 2 Year 3 Year 4
Sales $3,271 $3,720 $3,644 $4,070
Cost of goods sold 1,175 1,346 1,303 1,337
Average Inventory 662 694 655 645
A. Compute the inventory turnover for each year
B. Compute the average number of days that inventories were held each year
C. Compute the ratio of cost of goods sold to sales , expressed as a percentage for each year
D. How well has the company manage its inventories over the four years?