We cannot directly answer this. Audit Certificates have to ensure that the charges included on the C form have been actually incurred and are recorded in the books and are allowable as per the contract. Costs can vary considerably between and within countries and are also related to the experience of the Auditor. A more experienced auditor is able to recommend ways to improve your in house system and method for charge allocation. It is our belief that charges must be based on a fixed fee and not be related to the amount of money claimed.