The Circle City Pacers offer season-ticket packages ranging from over $200 per seat for courtside tickets to upper- level seats priced at $20 each. Mark Frohlich has decided to buy season tickets (with 41 home games in total) for his family of 4 and has settled on the $110 tickets, for a total purchase price of $18040. Mark has the option of paying the full amount today, or he can take the payment plan where he will make six equal monthly payments of $3100 (with the first payment due immediately). What is the EAR implicit in the payment plan?