TL here. It's because she's talking to Aina, a young girl who she clarified the word for in case she didn't understand"The lord back then used his fortune... that's money [...]"
Ah, thanks for the clarification. I thought he was just a very lucky dude.
For a story about trading/being a shop owner - it is often very bad in that aspect.A difference in price for soap that small isn't significant. Soap isn't something you use a lot of, so it's a very small cost relative to your overall spending. It's not a matter of can or can't afford. It's a matter of wanting to spend a small bit of extra.