Josey is a baker who specializes in cookies. She is aspiring to become the next Mrs. Field’s entrepreneur. She has a contract with a local coffee shop that orders cookies totaling $300 each month. She charges $6 per cookie extra if additional cookies are ordered any given month. Last month she earned $540.
a) Write an equation to determine the number of cookies ( c ) sold last month? _________________________
b) Solve the equation to find the number of additional cookies Josey sold last month.