Tally Expert for one Purchase Voucher

Hey Everone,
Need a person with a tally expertise. What I want is in tally prime, when I enter a purchase voucher, I am putting creditor name in the voucher. I also want to add the transportation cost to the stock value, but that transportation cost should not be added to creditor as it is paid in cash. So summarised, the stock should be added by both the purchase value as well as the transportation but the creditor should be credited only with the purchase value as that is the only amount i owe him.
If you can show me how to solve this problem then we can talk on chat