Hi Dryan,
You mean to say you want to clear the vendor balance by inventory. If yes, then you have 3 options.
1.Create a vendor as a customer and create a sale order and do billing. With this customer balance you can set up vendor balance.
2.Issue to goods to cost centre by movement type 201/551(Scrapping) and post vendor a/c dr and consumption a/c Cr. With this posting your inventory will also get reduced and your vendor balances also get cleared
3.Post manually by posting inventory A/c Cr to vendor A/c Dr. But here your stock not cleared.
Regards,
Mukthar