Assume a company whose sales are all on account provided the following information: Gross margin percentage 40% Cost of goods sold $ 300,000 Accounts receivable balance, beginning of the year $ 20,000 Accounts receivable balance, end of the year $ 30,000 Net income $ 10,000 The average collection period is closest 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?