(I work at a grocery store btw)
Customer: "is this corn flour?"
Me: "no. That's just regular flour."
Customer: "so it's corn flour"
Me: "no its regular flour like wheat flour"
Customer: "what's it made out of then?"
Me: "...wheat"(trying not to scream at them)
Customer: "what do you use it for then if it's not made out of corn?!" (Yelling at me btw)
Me: "I don't know what ever you want to?? It's just regular flour, it's used in recipes that call for flour"
*Customer proceeds to storm off out the doors*
