The cost per unit in the production of an mp3 player is $60. the manufacturer charges $90 per unit for orders of 100 or less. to encourage large orders, the manufacturer reduces the charge by $0.15 per mp3 player for each unit ordered in excess of 100 (for example, the charge is reduced to $87 per mp3 player for an order size of 120).
(a) write the profit as a function of x.
(b) how many radios should he sell to maximize profit?

The u.s. stock market has returned an average of about 9% per year since 1900. this return works out to a real return (i.e., adjusted for inflation) of approximately 6% per year. if you invest $100,000 and you earn 6% a year on it, how much real purchasing power will you have in 30 years?

When the national economy goes from bad to better, market research shows changes in the sales at various types of restaurants. projected 2011 sales at quick-service restaurants are $164.8 billion, which was 3% better than in 2010. projected 2011 sales at full-service restaurants are $184.2 billion, which was 1.2% better than in 2010. how will the dollar growth in quick-service restaurants sales compared to the dollar growth for full-service places?

Asap describe three different expenses associated with restaurants. choose one of these expenses, and discuss how a manager could handle this expense.