How to cost active time?
I'm sorry if this is in the wrong section but I was wondering if there's a way to fairly price active time. I'm going to be selling at a farmers market somewhat soon so I need to price my goods but when I'm making dough, I may be making enough dough for one loaf or four. I don't felt like charging for rise time and proofing is fair since I can be watching TV or gone to walmart. Just the active time seems a fair way to charge so I'm hoping theres,a good,way to go about this. What I have been doing is assuming a $9 per hour labor rate and 20 minutes for active time. Is there a better way to do it? I don't mind totally discounting my time while I am first starting just to get my products out there but I don't want to have to double my price down the road because I want to get paid for it.
I'm trying to learn this stuff as I go so thank you for any help.