What do you mean 20 shots? 1 CC?
So you got 20ml's of Enanthane? How many mg's per CC is that?
And how many mg's is the Deca?
Just from your post I can tell that you need to re-evaluate about using any AS. Research and learn before you do anything.
Put the "shots" down for a second, do yourself a favor and take some time to read through these boards a little bit and then try to figure you cycle out.