Of course there must be. Rental agencies do incur cost to missing gas, car damage, etc, and they must track incident cost accrued vs incidental cost billed to c

Of course there must be. Rental agencies do incur cost to missing gas, car damage, etc, and they must track incident cost accrued vs incidental cost billed to customer. If B < A, someone gets their ass chewed out. To avoid that, they commit fraud and spread the incidental cost on everyone.