This is a good idea. Something like a toggle to have prices of the same product in other shops of the same type the same price, the same extras, the same salary for multiple employees, etc.
Another idea would be to have a management editing tool (a separate tab or menu) that can apply changes like food prices, extras, salary, etc. to multiple shops and employees at once;
a way to create a custom batch that can apply one or more changes to multiple shops/rides/staff/etc. at once.