Note: Wagons have FOUR wheels. (In contrast to one brownie per sundae.)

Wagonco has two divisions: Wheels and Wagons. Each wagon needs four wheels. Fixed costs = 0.

	Wheels	Wagons
Sales/Market Price	$5 per wheel	$50 per wagon
VC	$3 per wheel	$22.50 per wagon, not including the cost of wheels (four wheels per wagon)
Items sold to outside market	2,250 wheels per month	800 per month
Capacity	5,000 wheels per month	per month

What range of transfer prices would instill goal congruence? Prove using CFISes.