Mattress Wholesalers, Inc. is constantly trying to reduce inventory in its supply chain. Last year, cost of goods sold was $$7\mathrm{.}51$ million and inventory was $$1\mathrm{.}47$ million. This year, costs of goods sold is $$8\mathrm{.}57$ million and inventory investment is $$1\mathrm{.}64$ million.

a$)$ What was its weeks of supply last year? $10\mathrm{.}21$ weeks $($round your response to two decimal places$).$

b$)$ What is its weeks of supply this year? weeks $($round your response to two decimal places$).$ I need help with this please