Fashion Math

Clearly I have a formula for getting dressed in the morning.  Blouse + skirt + cardigan.  Repeat forever.  I wonder how many combinations of outfits I could make out of my whole closet?  Maybe if I paid attention in college math I would know that.  I'm sure it has something to do with factorials or something.  If the examples used in the class had been about clothes and not balls and urns I probably would have learned a lot more.

Cardigan - JCrew Tippi
Skirt - JCrew Number 2
Shirt - Banana Republic
Belt - JCrew