The average annual sales per Red Lobster restaurant were approximately $3,800,000 in 2007 and $3,900,000 in 2008 and each restaurant will serve 150,000 to 225,000 customers per year. A typical Red Lobster restaurant will include four to five managers and 60 to 100 hourly employees referred to as crew members. Operating departments include Service, Culinary, and Beverage Hospitality. A Red Lobster manager will rotate through each of these departments as they develop their careers. As a Red Lobster manager, you will be responsible for managing between 10 to 20 crew members per shift to serve customers and achieve established sales and profit objectives. 

Required

From the above information, calculate the following assuming 365 days per year:

a. Average sales per day.

b. Average customers served per day.

c. What is the percentage increase in average sales per restaurant from 2007 to 2008?