I think the special at subway-sandwich, drink, chips is 8.00 or 9.00 for the pricier sandwiches. That is with sales tax and a tip. Since it is money out of my pocket, I include it as part of the cost.
Yes, you can buy cheaper sandwiches, for example Calmart has great sandwiches for 5.99. But if you go into a restaurant and eat it there, a sandwich will cost you a good 12 bucks. By the time you add a beverage, tax and tip, you've spent nearly 20 bucks.