Food cost is a guess
Recipes live in someone's head; ingredient prices move and nobody sees the margin per dish.
Point of Sale that talks to the kitchen, recipes that deplete stock as dishes sell, purchasing from suppliers on par levels, and each outlet's takings posted to Accounting the same night.
Recipes live in someone's head; ingredient prices move and nobody sees the margin per dish.
Walk-in fridges checked by eye; orders placed by habit; waste unrecorded.
Each outlet's Z-report and delivery-platform payouts reconciled by hand, days later.
POS, recipes and books for a single outlet first; the central kitchen and other outlets follow.