1. In a dynamic liquid product distribution environment, a method of providing a virtual real-time reconciliation of a perpetual book volume based on recorded sales transactions to a physical volume based on physical measurements for one or more of a plurality of tanks while liquid product is being dispensed therefrom, the method comprising: receiving a request to perform a liquid product book to physical reconciliation process for one or more storage tanks during a predetermined period of time; identifying the status of one or more liquid product dispensers corresponding to the one or more storage tanks; during said predetermined period of time and while said one or more liquid product dispensers are in an active state, taking a plurality of measurements within the one or more storage tanks and said one or more liquid product dispensers; determining a net perpetual liquid product book balance corresponding to total real-time sales transactions, said total real-time sales transactions being equal to the recorded sales transactions completed at the end of said predetermined period of time and a portion of the unrecorded sales transactions which were ongoing at the end of said predetermined period of time; and based on said plurality of measurements and said net perpetual liquid product book balance, automatically performing said virtual real-time perpetual book to physical reconciliation process while liquid product is being dispensed from said one or more liquid product dispensers.