List your coursework exactly as it is listed on your transcript. That is what AMCAS checks it against. In my case, my college doesn't award credit hours, so I left those boxes blank. I put all of my grades as "P." AMCAS calculated a GPA of 0.0 for me based on no credit hours. You have credit hours and presumably you've taken other coursework for grades, so I have no idea what they'll do for you.