A clothing company makes a profit of $10 on its long-sleeved T-shirts and $5 on its short-sleeved T-shirts. Assuming there is a $300 setup cost, the profit on T-shirt sales is z = 10x + 5y -300, where x is the number of long-sleeved T-shirts sold and y is the number of short-sleeved T-shirts sold. Assume x and y are nonnegative. Complete a. through c. below. a. Graph the plane that gives the profit. Choose the correct graph below. O A. O B. &C. OD. 300 60 30 - 100 N X 10 X 60 30 - 300 60 b. If x =5 and y = 15, is the profit positive or negative? The profit is which is (Simplify your answer.)