Should I Manage a store as a full-time student?

So I am in my sophomore year as an Econ/Finance major and have been working Full-time hours as an Assistant Manager at a local chain near my school. I also balance a full-time course load of five classes a week. My grades are not A1 but I am passing and getting by. I managed A's and B's my first semester working these hours but may be in for an increase as store managers typically work 50 hours a week. Do you feel like the experience I would get working full-time as a Store Manager on top of being a full-time student would be valuable?