15,000	36mos	0%	$417 / month	total interest
15,000	48	2.99%	$332 / month	$933.60
15,000	60	3.99%	$276.18 / month	$1570.80
15,000	72	4.99%	$241.50 / month	$2388.00


2800	21200	(1500 less than 3400)   -  [then he calculated?]  12500  tractor  3400 loader 5400 backhoe      21300  
at 20k   it's 377 / month   4.99%  for 5 yrs


7510  21hp     larger tractor      16800