I am currently in the process of pricing my commissions one by one and organizing things so that I can set up my official commission price page. However I keep getting conflicted feelings as to how much I should price my work. I have icons, sketches, digital work and reference sheets just to name a few things and I just can't really decide how much to charge. How much is too much. And when am I undercharging.

The real pickle for me is when I do design work. Design is kinda nebulous. If asked to design a new character from scratch, how does one charge for it? Or if I'm tasked with the revamp of an existing character, does it receive the same treatment? Having come from a recently acquired design background, there are certain things I have to do before getting to a final design conclusion like doing research and exploration sketches. Thing is I'm just not sure how to factor the cost for things like that.

Any advice would be appreciated.