It would be so helpful if, when adding a new item to your inventory, you could choose to have it automatically deduct the item’s cost from your stored currency. Here’s a mock-up of the UI; I used MS paint and I am no artist, don’t judge.
No judgment here, that’s a better mockup than I could do! I agree it would be really cool if there was a way to automatically deduct currency without needing to manually change the values. I’ll pass the suggestion along to the rest of the team.