Jyu Go

I was at a McDonald's just now, trying to cash in on a sweet deal. Five McNuggets for 1,25$. So I went up to the cash, and asked for "Jyu-go (fifteen) McNuggets," to which the guy replied.
"Jyu go?"

"Yes," I confirmed.
(In Japanese) "That will be 1000yen."

To this I was puzzled, but I figured the deal was over. I made no fuss and gave him 1000 yen.
"For here or to go?"
"For here."
He looks at me like I said something funny. And then I got this.

Because instead of "Jyu-go" - Fifteen pieces, he thought I meant "Jyu go" - Ten Five. As in, ten boxes of five. I now have my lunch and dinner for tomorrow.