Mulch blades installed, or not installed? That is the question.

Hi, I had a tractor delivered last night.

OK, is everything all right?

It was my understanding that if I purchased a mulch kit with the tractor it would arrive installed.

Yes, that’s right.  Didn’t that happen?

I don’t think so.  They handed me a box with two blades in it, like they expect me to install it.

OK, the mulch blades should be installed and the box they handed you should contain the standard blades.  Did you look at the installed blades?

How am I supposed to do that?  They’re under the tractor.

All right.  Did you look at the blades in the box?

It’s a sealed box.

OK, everything sounds correct.  I’m thinking the standard blades are in the box.

But… The box is sealed.