A Neighborhood Has Come Together to Make a Community Garden

A neighborhood has come together to make a community garden out of a 90-square-foot plot of land between two houses and in it, they grow organic tomatoes and squash. It costs them $10 to grow a square foot of tomatoes and $15 to grow a square foot of squash each month. They are able to raise $1140 each month to cover the costs of growing the vegetables. The profit for each square foot of tomatoes is $15 and the profit for each square foot of squash is $20. How many square feet of each vegetable should be grown in order to maximize the community's profit?

A) 0 square feet of tomatoes and 76 square feet of squash
B) 90 square feet of tomatoes and 0 square feet of squash
C) 42 square feet of tomatoes and 48 square feet of squash
D) 48 square feet of tomatoes and 42 square feet of squash