We recently had an assistance visit from GSA, during which time the auditor flagged one of our contracts for overpayment. It is a FFP contract, base + 3, under a GSA schedule. The contract has a 3% escalation for each option year - unfortunately our GSA schedule has no escalation. We typically discount off our published rate but in this instance did not. Neither our contract nor our invoices contain any rate or hour information - we were simply funded a total FFP and invoice equal monthly installments. The only place that indicates any rate information is a cost buld-up found in the file (