Your firm purchases goods from its supplier on terms of 1.2/by 15, net 35.

a. What is the effective annual cost to your firm if it chooses not to take the discount and makes its payment on day 35? The effective annual cost is ______%. (Round to two decimal places.) b. What is the effective annual cost to your firm if it chooses not to take the discount and makes its payment on day 45? The effective annual cost is ____%. (Round to two decimal places.)