9) Olivia sells fantastic cookies. Her shop Olivias Fantastic Cookies has fixed costs of $4,500 per month. Because her cookies are fantastic, they are made with extreme quality and care, having a per-unit cost of $2.50. If Olivia can sell at least 1,200 cookies per month, at what selling price per cookie will she breakeven?

a) $2.50

b) $3.75

c) $4.75

d) $6.25