Which of the following is true? a. checks and debit cards both withdraw money directly from a bank account. b. debit cards offer the highest level of fraud protection. c. checks are the most widely accepted form of payment d. debit cards often have a higher interest rate than credit cards.

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?