What you are asking for is usually implemented by meeting with a system integrator.
I am looking for an electronic receipt book system for my sales agents. These agents collect cash and cheques from clients and I want to eliminate the written receipts. The I want be able to capture the customers signatures and the information on how much was collected. The sales agent's device can be a smartphone paired with a Bluetooth printer or a all-in-one mobile terminal printer unit.
The system ideally should be able to update the back office so that at the end of the day reporting on how much was collected is easily generated.
Looking forward to any help or suggestion on a possible solution to meet the above.