legal analysis: the calculation of illegal income from catering: it is illegal income to deduct all the income obtained by the parties from the illegal production and sale of goods or the provision of services from the appropriate and reasonable expenses directly used by the parties for business activities.

legal basis: article 64 of the criminal law of the people's Republic of China: in the handling of criminal articles, all the property illegally obtained by criminals shall be recovered or ordered to make restitution; The lawful property of the victim shall be returned in time; Contraband and personal belongings used for committing crimes shall be confiscated. Confiscated property and fines shall be turned over to the state treasury and shall not be misappropriated or disposed of by themselves.