The price I told you I was able to keep $30-40 was my 10.5 x 15.5 in a 16x20 frame, not an 11x14 frame. $42 for a print, and frame for your costs is a lot if you are selling your framed work for under $100.
For me, as far as art prints, I never send out any print without my signature on the bottom right 1/4 inch white border along with a title in the center. I also include a "Certificate of Authenticity" with information on the type of paper used, date and place the picture was taken along with the edition number.
If you are selling portrait type photography, obviously you wouldn't be signing.
Here is an example of where I sign and frame my own work. although this one is a 12x18 in an 18x24 frame
