Pay Tonna, Charm her, or Don’t Pay?
When you encounter Tonna outside Tonnastadir during Bartering, you’ll have three dialogue choices to obtain the information. Tonna will state that she could use another cow, and that you can cover the cost in exchange for the information. If you have at least Charisma level 2, you’ll be able to offer Tonna 260 silver instead of 520 silver. However, if you choose the third option, you can obtain the information for free, after a bit of work.
“Agreed. (520 silver)”
Eivor pays Tonna 520 silver and she reveals the information. A hefty price.
“Half is all you’re getting. (260 silver)”
So long as you have at least Charisma level 2, you can pay Tonna half of what she’s asking to obtain the information.
“I’m not going to pay you.”
This choice results in Eivor outright refusing to pay. However, you’ll then need to infiltrate Tonna’s house to obtain the information for free.