Kelly reads an advertisement for a zero finance charge installment plan when a new riding lawn mower is paid in full within 8 months. She goes to the store offering the promotion and finds out that the mowers are $892. The minimum payment that must
be made each month is $55. If Kelly only pays the minimum payment for 7 months, how much must she pay on the eighth
payment to avoid finance charges? Do not include a dollar sign in your answer.