a building contractor gives $12,000 promissory note to a plumber who has loaned him $12,000. The note is due in 9 months with interest at 9%. six months after the note is signed, the plumber sells it to a bank. If the bank gets a 10% return on its investment, how much will the plumber receive ? Will it be enough to pay a bill for $12,104? how much will the plumbee receive ? round to nearest cent as needed