The price doesn't matter very soon in the game. It literally showers you with expensive items. Even more so if you don't kit out even companions you don't use like I do.

if it's about the BP just deal in hundreds for ease of use.

Thanks for the tip!

*groan* Is this a recent bug?

The only items worth buying in bulk is probably BP. There's no ammo in this game, and you start getting stockpiles of cure pots eventually for free if you have a decent group (unless you've decided to heavily rely on cure pots - expensive and least effective form of magical healing). Not sure what else would merit bulk purchase; maybe food and spell components?

https://imgur.com/a/06CLfp8 - what I thought was the total

https://imgur.com/a/LxG0Sag - actual total

I was playing Varnhold's Lot. Just mentioning that for the sake of context. I had 18k (the enclosed screen cap shows 25k, but is from a different save) and I didn't know what else to buy, so I thought healing potions would be a good investment. Then I went to buy some potions and potion accessories and I saw the number I circled in red. I assumed that was the total cost. Turns out I was off. I was waaaaaaaaaaaaaay off. That's what led to me posting this thread. I'm pretty sure that's not a bug. The slider just shows amount you're buying. I apologize if it sounds like I'm drunk or something. I'm actually just really tired.