Thanks but I ended up installing the Invoice Falcon App that was suggested earlier in this thread. Works great.

I tried all those different options, but still can't get the app to install. I'm not sure what the issue is, but every time I get a message that says 'There's no page at this address."

Thanks for the suggestion!

Thanks, I'll give that a try. 

Is this app no longer available? I tried to add it but got a message saying 'There's no page at this address."