can someone please help me on this question i’ve been at it for a long time and i still don’t know it

Dan wants to start a supermarket in his hometown, and wants to get into the business only after finding out about the market and how successful his business might be. the best way for dan to gain knowledge is to:

An allergy products superstore buys 6000 of their most popular model of air filters each year. the price of the air filters is $18. the cost of ordering and receiving shipments is $12 per order. accounting estimates annual carrying costs are 20% of the price. the supplier lead time is 2 days. the store operates 240 days per year. each order is received from the supplier in a single delivery. there are no quantity discounts. what is the store’s minimum total annual cost of placing orders & carrying inventory?

The recognition of which of the following expenses exemplifies the application of matching expenses with the revenues they produced? multiple choice(a) cost of goods sold. (b) advertising.(c) president's salary.(d) research and development.