I’ll review today’s lesson about how to exchange money in Japanese later.
I can replace both of your moneys for other moneys at this money exchange. I can also make change for you too, if you'd like. You'll probably see this word the most in Arcades where you can go to the 両替 machine and get coins to feed your UFO catcher addiction.
The reading here is a bit weird. Instead of just being か (it changes to が for the rendaku), it is がえ. Just think that if you want change exchanged, I'm your guy (がえ).