A 100-seat restaurant with average daily turnover of 2 and average check of $15 opens 365 days a year. Food cost is 38% of revenue and other variable costs is 22% of the revenue. Fixed costs are $220,000 a year.

a. How much is the variable cost per customer?

b. How many customers does the restaurant have to serve if the owner wants a $200,000 operating income?

c. The owner is not satisfied with the operating income and wants to improve it to $250,000 by increasing the average check to $17. To avoid customers deflecting to other restaurants, the owner will spend an additional $30,000 on advertising (additional fixed cost). The owner also wants to add $20,000 her own salary (another additional fixed cost). Assuming the variable costs per customer do not change (the same as in question a.), how many customers the restaurant needs to serve now?