Should I still take classes?

I applied early decision to my pharmacy school of choice. I have already been contacted for an interview in September. However, due to a poor GPA and academic history, I had already planned to retake General Chemistry to boost my application if I was denied early decision. It is the only class I had received a C in for my pre-reqs. I am also signed up for a Nutrition Biology class. It was one of the only science classes left I hadn't taken at my college. I forgot to even add these classes into PharmCAS when I applied, so I said I was taking Fall classes, but never went into detail regarding which ones.

My interview is September 18. I will have an answer on acceptance a week later. My classes start this Monday, and I can only get a full refund if I withdraw before they begin. I want to drop them due to cost and lack of necessity. However, my parents feel like I should keep them. If I am asked during the interview about what I am doing to better myself, I could say that I was retaking a class I had done poorly in. I don't think it will even come up, but I wanted some opinions from you.