Cascade Enterprises enjoys a substantial amount of market power in this market. Cascade has fixed costs of $2,000. Currently Cascade Enterprise employs eight workers to produce 430 units of output and, the last unit of worker contribute 40 units of output. If Cascade Enterprises pay a monthly wage rate of $2,000 and charge $50 per units for its product, what is the amount of profit made?

	A.	$3,500
	B.	$5,500
	C.	$ 60
	D.	$1,680