buy a product advertised with a $100 price tag. The shop gives you payment terms of 5/30 net 90. This means that if you pay within 30 days then you can have a 5% discount (pay only $95), otherwise you must pay the full $100 price by day 90, measured from the purchase date. What is the simple interest rate per annum implicit in the discount being offered? If the bank offers 10% pa borrowing and deposit rates, should you pay the shop on day 30 or day 90? Assume 365 days in a year. All of the below answer choices are given as simple annual interest rates. The implicit simple interest rate is: Select one: a. 5% pa, so you should pay the shop on day 30. b. 5.2632% pa, so you should pay the shop on day 90. c. 5.4035% pa, so you should pay the shop on day 30. d. 20.2778% pa, so you should pay the shop on day 90. e. 32.0175% pa, so you should pay the shop on day 30