Medieval Folk Healer - how to determine the treatment price?

see sabj.
At start of playing I set 10% higher price than current herb's market price is. But I don't want to sell my service at cheap price. So, how to determine the appropriate fee for treatment in Hospital?
All comments are welcome.
At start of playing I set 10% higher price than current herb's market price is. But I don't want to sell my service at cheap price. So, how to determine the appropriate fee for treatment in Hospital?
All comments are welcome.