I have a wireless router at my store branch, but no wireless PC at that location. I have a wireless jet direct box for my printer.
My 1st question: Do I need a wirless PC at this location in order to connect my wireless jet direct box to the router?
My 2nd question: Do I need to add IP addresses for wireless connections in the router set up?

If your printer is getting an IP wirelessly from your router, then ANY device on the network, whether wired or wireless can print to it.

Your router should be functioning as a DHCP server assigning IPs to the network devices.

The wireless jet direct for the printer will have a static ip address, so does your answer still apply?

Yes, As long as the address is recognized by the DHCP server.

P.S. Please don't use e-mail for followups.

Thank you ScottGem for your help. I'm new and will make sure I learn more about the site in the future on how to communicate with users.