Susannah purchased a lawn mower for $1,250 using a six-month deferred payment plan. the interest rate after the introductory period is 25.99%. no down payment is required, but there is a minimum monthly payment of $30. what is the balance at the beginning of the seventh month if only the minimum payment is made each month during the introductory period? the answer is $1,241.49 i just don't know how to get there.