Joe knows that adding a special grain supplement to his cows will produce more milk according to the following schedule: 1/3 2/6 3/8 4/10 5/11 6/12; where the first number reports the total number of pounds of grain supplement, and the second number reports the total amount of milk produced. For example, 3/10 means that if the cow is fed 3 pounds of grain supplement, the cow will produce 10 units of milk. How many pounds of grain supplement should Joe feed the cows if the farm receives $0.30 per unit of milk and the price of grain supplement is $0.50 per pound?

		3 pounds
		6 pounds
		4 pounds
		2 pounds
		5 pounds