Which specific chart converts passed grades to 2.0? Most list passed grades as AMCAS P with no grade point value (and not-passed grades as AMCAS N with no grade point value).
Still, regardless of AMCAS grade point conversion, repeating AP calculus credit, then choosing P/NP grading, and then repeating the course with a less rigorous version (business calculus instead of regular calculus) may not look good in terms of academic strength if the application gets to the point of being read by a human admission reader.