Anyone who has gone to cscc nursing

Hi-I have a Q about the 2nd quarter books for pharm. Do I NEED the 3-2-1 Calc! CD? Because I bought a used Dosage Calculations book last week (w/o the 321 calc!) and order the others online. Well, now I have 2 of these books bc it came with the 321 calc cd. The new one is shrink wrapped with the 321 calc cd and I can't return it if I open it and get my 88 dollars back. So here is my question-did you use the online program? The syllabus doesn't say anything about it-if not I am going to return the package and get my $$ back. If so, I will sell the used one that I bought. Thanks!!