All products showing price free with woocommerce

after googling that problem I saw a few posts of this issue, the solution was something in the Theme my issue more or less the same, but I also see in the Products page in the control panel that every products are priced FREE for some reason, and when I get into a specific product(edit view) I do see the price there. and ideas why is that ?

http://s23.postimg.org/piqh23bpn/tableandprice.jpg (the image shows on the left side the table of the products that everyone is free, and the left image show the price in the product edit)

I’m using woocommerce version 2.1.12, WordPress version 3.9.1 thanks!