A man who breeds birds looks at his monthly expenses. Canaries each need 1 unit of vitamins and 4 units of food per month, while finches need 1 unit of vitamins and 2 units of food per month. There are 200 units of vitamins and 500 units of food available each month. How many of each type of bird should be raised to maximize monthly revenue if canaries sell for $45 each and finches sell for $35 each