What usually surprises people
Milk costs more than coffee. In almost every milk-based drink, the milk line is larger than the bean line, often substantially. Cafes that have spent months negotiating bean prices have usually been optimising the smaller number.
Packaging is enormous on cheap drinks. A 12-peso cup on a 60-peso iced tea is twenty per cent of the price before a single ingredient.
Waste is invisible and large. Milk left in the pitcher, shots pulled and dumped, syrup free-poured instead of pumped. None of it appears in any document you already have.
What to do with the numbers
Rank your drinks by gross profit in pesos multiplied by weekly volume. That ordering, not the percentage ordering, tells you which drinks the business actually runs on.
Protect the top of that list. Do not discount those drinks, do not bury them at the bottom of the menu, and make sure every member of staff can make them consistently.
For anything near the bottom, decide deliberately: improve it, reprice it, or remove it. A menu item that neither sells nor earns is costing you stock, training and space on the board.