Administrators can create one-off invoices for items without including any information regarding monthly meal numbers.
Go to Kitchen Manager > Invoices > select a Region, Type, Contract, Site or Group > set the Type  > set the Date Range  > click One-off Invoice  button
After clicking the One-off Invoice button enter a reason (i.e. Staff Training) for the invoice charge into the Name column , a monetary Value  (i.e. 10.5) and press Enter, select a Site  or Sites, then click Generate .