If you are generally happy about how the podcast turned out, and you just need a few edits, mixing of intro and outro, levels adjustment etc. you can use the Basic package.
If there are audio problems that need improvement (for example constant background noise or too much room sound) pick the Standard package.
If there are problems with dead air (long pauses), repeated words, too much "um"s and "ah"s, pick the Premium package and I'll go through the whole audio and make it much more streamlined.
All packages cover the full length of audio.