although the invoice has not been developed, if the catering service has been provided, the income should be confirmed according to the self-made business income document, because the basis for confirming the income is the certificate that the service has been provided and the payment has been received or the payment has been obtained. It is the general principle to carry forward the cost receivable income in proportion. I wonder what you mean by the cost without invoice? Does it mean that the cost has been paid, but the compliance invoice has not been obtained? If this is the case, it can't be charged to the account. You need to ask for a formal bill to confirm it as a cost.