[Cecily]

Sometimes it's helpful to look at prices in terms of copper.

1 plat = 1000 copper
1 gold = 100 copper
1 silver = 10 copper
1 copper = 1 copper

So 5g,1s,9c would be 519 copper.
5g, 2s, 3c would be 523 copper.

5 CHA saved you 4 copper pieces! Yay...