In marketing and in auditing this is known as dis-aggregating the population, with the population being defined by the funds which I hold in the account!!!!
This would provide an easy way to track my customers and provide follow up service!!! P.S. It would aid in an comparison of year on year values and customers, fast track the analysis process and allow for documenting changes year on year and perhaps prompt an inquiry into the reasons for changes.
Imagine if I were exporting a service instead of a good then I may not be able to charge VAT on the transaction!!! Of course I may not want the headache of getting items to the airport, too cumbersome!!!"