Gator Bicycles just bought a new brake calibration machine that is expected to generate $20,000 in new revenues each of the next four years without increasing cash operating costs. The machine will be depreciated according to the MACRS 3-year class of assets, and its depreciable basis is $80,000. If Gator's marginal tax rate is 35 percent, what are the annual supplemental operating cash flows attributed to the machine? Round your answers to the nearest dollar.

Year	Supplemental operating CF
1	$
2	$
3	$
4	$