Mind-boggling

My boss just called my office and we had this conversation:

*ring ring*

ttw: Hallo, xxx lab.

boss: hey ttw, I wanted to ask you, do you know how to spell "repertoire"?

ttw: err... .wha..?

boss: you know, like a collection of things...

ttw: R-E-P-E-R-T-O-I-R-E?

boss: oh, ok. thanks. bye.

*dial tone*

WHAT. The. --___--