Problem with info on order receipt

[FelinesFabricFriends]

I am unsure what is happening here. A customer in California ordered two items. When I go to print out order receipt and packing slip as usual, for some reason my page that shows everything, payment is in US dollars. But on packing slip to send to customer the costs are in Canadian dollars!! What does this mean?

[NanaLetha · Accepted solution]

@FelinesFabricFriends  They have their currency set wrong. 

[FelinesFabricFriends]

Oh,okay. I just printed it all out and wrote a note on the packing slip and will mail it today.