Mattress Wholesalers, Inc., is constantly trying to reduce inventory in its supply chain. Last year, cost of goods sold was $7.5 million and inventory was $1.5 million. This year, cost of goods sold is $8.6 million and inventory investment is $1.6 million.

a) What were the weeks of supply last year?

b) What are the weeks of supply this year?

c) Is Mattress Wholesalers making progress in its inventory-reduction effort?