I mean it can save you a little on labor. If you’re hand writing orders and calculating totals, it’s going to take you double or triple the amount of time at the very least for every order. For instance, say you typically need 3 phone people on a Friday night, maybe with a POS system you only need 2. The real savings is in efficiency. No more time wasted simply adding numbers. If you’re paying a manager to add numbers, there’s some more savings for you. From an administrative standpoint, reporting will help you see exactly where you’re doing well and where you’re not. High margin items vs low margin items, what sells at what times, spots you might be able to cut down on labor, employee performance, inventory, etc.