A device has a deposit, a sell, and an audit mode of operation to monitor and reconcile bills. The device includes a memory storing records, an input receptacle to receive bills, an image scanner to image bills, a transportation mechanism to transport bills, and one or more processors. In the deposit mode, the one or more processors extract serial numbers and generate records. Each record includes a physical bill location field to indicate the location that the bill is expected to be physically located. In the sell mode, the one or more processors update the physical bill location fields to indicate that the expected physical bill location is a second location. In the audit mode, the one or more processors determine if each record corresponds with an audit record and generate an indication that the teller drawer is balanced responsive to a determination that each audit record corresponds with a respective record and a determination that each record corresponds with an audit record.