A bake sale sells cupcakes and cookies. One day they sell:
up to 50 cupcakes
up to 60 cookies
no more than a total of 90 cupcakes and cookies.
Let x be the number of cupcakes sold. Let y be the number of cookies sold.
a. Show the region that satisfies these inequalities.
b. If cookies are sold for $1 and cupcakes are sold for $1.50, what is the
maximum amount of profit they can make?