[Inkscape-user] vectorized EPS?

Hi! I am a new user of Inkscape, and as for now I just have one purpose of this. I want to convert a jpeg-file to a vectorized EPS file? The purpose of this file should be to give the eps-file to a printing company who should create a commersial sign for my small business. Is there anyone of you who can tell me the easiest way to get this eps-file from the existing jpeg-file, if this is possible in Inkscape? Best regards

Lars T.