DEAR ABBY: When taking advantage of a restaurant's offer of "buy one meal, get one free," what is the proper way to calculate the tip? Should a percentage be calculated on the price of the first meal only, for which the diners are actually billed, or for the value of the two meals combined? Also, what is the current tip percentage for adequate service? (A free dinner is riding on your answer!) -- STUCK FOR THE TIP
DEAR STUCK: The current tip percentage for "adequate" service in a restaurant is 15 percent. And, when taking advantage of the "buy one, get one free" offer, you should calculate the tip as though you had actually paid for the two meals. (It's called not stiffing the server.)