[Koha] Currency Management in KOHA

We are facing problem in handling currency. Can anyone help ? Problem: KOHA allows currency association with the Vendor at the time of creating/modifying a new Vendor (i.e. 1 Vendor - 1 Currency. Generally in our situation it is not possible to have 1 Vendor - 1 Currency. There are many orders placed with different curreny to a single vendor. Following is an example for clarification. BOOK 1 ordered to VENDOR-1 which is priced in USD BOOK 2 ordered to VENDOR-1 which is priced in POUND BOOK 3 ordered to VENDOR-1 priced in INR Can anyone suggest how to manage such transactions in KOHA 3 Thanks Ravindra IIM Ahmedabad