plugin to create downloading fees from WP site

Hello World,

I am a newbie, trying to create a method to charge for downloaded recipes. Yep I have something special in my recipes and want to charge a customer per download. So I am looking for a plugin to add to my site to charge a modest fee per download. I am looking for any and all help! I prefer to be able to download to a cellular phone or computer. In turn the customer will be able to create the recipe as they wish.

Regards,