Maile’s Flower Shop gets a rose delivery once per week for which they pay 67 cents per rose. Roses are sold for $1.27 per bud. Because of city disposal policies, it costs an average of 2.2 cents per rose to get rid of unsold roses at the end of the week. Sales are normally distributed with a mean of 1,893 roses per week and a standard deviation of 72. How many roses should Maile purchase?