Greenwell Farm Equipment sells a tractor to Farmer for $ 80 comma 000 on January 1, 2019. The tractor is delivered that day. Greenwell agrees that the Farmer may delay the payment for 2 years. The market rate of interest is 10 %. Refer to Greenwell Farms. How much interest revenue will Greenwell report over the life of this contract? (Do not round intermediary calculations, and round your final answer to the nearest whole number.) Use the formula approach.