14. Last year Jeanne started selling gigantic brownies for $5.00 each. She uses the finest ingredients and finds that her variable cost per unit is $3.75. She does much of the preparation and baking in her own kitchen but she rents a small kiosk at a fixed monthly cost of $2,000. If Jeanne wants to earn a monthly operating income of $3,000, how many brownies must she sell per month