Interstate purchase with surcharge - urgent

Dear Members

Please see the attachment and the Interstate Purchase Entry in it.

Venus is a Punjab dealer.

Glen is a Haryana dealer.

Venus purchasing interstate from Glen without Form C.

So Vat rate of Haryana applies.

In Haryana there is a surcharge of 5% on Vat rate.

I have passed majority of the entry but facing problem creating surcharge account.

Please tell me how to prepare the Surcharge account in a way that the surcharge amount gets added to respective interstate purchase accounts and to the value of stock items.

Please help, Its urgent.

Thanks