A manufacturer has a monthly fixed cost of $60,000 and a production cost of S10 for each unit produced. The product sells for $15/unit How many units should the firm produce in order to realize a minimum monthly profit of $5000?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?