I love a good ethnic joke

There was this Mexican guy, Black guy, and Asian guy all working for the same construction company. At the beginning of the day the boss calls a meeting with them about today’s work. They were all pretty new, so they had to be assigned jobs.

He says to the Mexican guy, "You’re in charge of the cement."
He says to the Black guy, "You’re in charge of the dirt."
He says to the Asian guy, "You’re in charge of the supplies."
After delegating out all the responsibilies he says, "I’m gonna be back at the end of the day to check on your work. It better be good or you’re all fired." The boss was quite serious and had a reputation for being shrewd. They immediately get to work.

At the end of the day, the boss comes back and checks on their work. He looks at the big pile of cement and says, "Nice work," to the Mexican guy. He looks at the big pile of dirt and says, "Nice work," to the Black guy. He looks around and can’t find the Asian guy anywhere so he asks, "Where the heck is that Asian guy?"

All of a sudden, the Asian jumps out from behind the big pile of dirt and yells, "SUPPLIES!"