Either invoice separately or the restaurant will invoice the guest room, so there is no other way;

The catering cost is calculated based on the goods actually purchased and the services incurred, and has nothing to do with the room rate;

yes. Formulating a specific internal system and compiling a roster according to the facts every month can be included in welfare expenses.

the first item does not belong to collection, and the collection of money meets two conditions: one is to give all the money received to the entrusting party, and the other is to issue an invoice by the entrusting party, and the entrusted party (you) will give the invoice to the consumer.