This point about every order carrying menu, price and location details is exactly what makes menu research so tricky in practice. A combo that looks like one item on a board can behave very differently across locations once discounts and limited-time versions are added, so a single sales total hides a lot. The useful question for a smaller restaurant is which few signals to watch first — for example, which items keep selling after a price change, and which ones only move when discounted — rather than trying to track everything at once.