Products Show Out of Stock in Woocommerce

Hi,

I’ve used Woocommerce to develop several sites, and never had this problem:

All of my products show “Out Of Stock”…I didn’t do anything differently when creating these products then I usually do, so I have no clue what is going on. If worst comes to worst, I just wont manage stock levels for this store, since we are a screen printing/embroidery company, and usually print the orders on demand. I am a bit curious though as to why this is happening.