In the aftermath of a hurricane, an entrepreneur took a one-month leave of absence (without pay) from her $5,000 per month job in order to operate a kiosk that sold fresh drinking water. During the month she operated this venture the entrepreneur paid the government $2,500 in kiosk rent and purchased water from a local wholesaler at a price of $1.34 per gallon. If consumers were willing to pay $2.25 to purchase each gallon of fresh drinking water, how many units did she have to sell in order to turn an economicprofit?