It’s the inaugural (maybe the only one ever?) “Money Mania,” a game show from “Million Bazillion” in which five lucky listeners compete in an elaborate obstacle course to get their questions answered. This week, we’ll tackle questions like: What is profit? Why do receipts have so many words? And, what do stores do with all their leftover holiday stuff? This episode is sponsored by Greenlight. (For a limited time, get $10 when you sign up for a Greenlight account at greenlight.com/MILLION).