How much is enough?

On Saturday I was driving around and decided to stop for a bite to eat. I decided to stop at Arbys to grab a bite (I don't care what you say, I like it). What I noticed that was interesting is that they have 25 combo meals. Yes 25! Is there that many different combinations of ways to eat roast beef? I order the roast beef patty melt, which was very good. It just struck me as odd that a place that makes roast beef sandwiches has 25 combo meals.