Using Pell Grant for Graduate Courses while Undergrad

[SophiaPrincess]

As a result of earning almost 100 hours through Sophia, I anticipate graduating with my bachelors in business administration with three years of unused Pell Grant. Rather than graduate quickly, I was wondering if I could take graduate level business courses as an undergrad and transfer them to a MBA program after completing my bachelors. Is this possible? Will most universities allow it? Will the majority of universities allow you to exceed 120/128 credit hours? Can the Pell grant pay for this as long as I have not completed my bachelor's degree? Which AACSB MBA programs accept the most transfer credit?

Thank you for your suggestions.