Vendor not giving correct change.
 

Had exactly 1pp. Bought a backpack from Rantho Goobler in Rivervale. Cost was 5gp 8sp 8cp. That means I should have 4gp 2sp 2cp back in change. However I was left with 4gp 1sp 2cp.

1000cp - 588cp = 412cp

Now I feel stupid lol