Systems, methods and computer program products for processing inputs of various formats to be used in an auction are described. In some implementations, a conversion application can be used to assist a user in setting a conversion ratio by which a service can be valued (e.g., for converting values between commercial and proprietary currency). In some implementations, a cash value of the service to be rendered can be defined. In these implementations, the conversion application can facilitate the determination of an appropriate conversion ratio by which the cash value can be converted to other currency value (e.g., to other proprietary currency).