The computer company has two manufacturing plants, one in Rochester and one in Queens. Transporting the computer from Rochester to retail outlet takes 15 hours and costs $15, while transporting the computer from Queens to retail outlet takes 20 hours and costs $30. Profit on each computer produced in Rochester is $40, and profit on each computer produced in Queens is $30. Rochester plant has 80 computers available, and Queens plant has 120 computers available. If there are 2100 hours and $3000 allotted for transporting computers, how many computers must be sent to retail outlet from each of two plants to maximize company's profit?