Without seeing your  images or discussing specific artworks, it is impossible to give a set price. 

Please contact me with what you would like, then I can give you a price. 

Depending on the type of editing desired, I will most likely request your sample image sent prior for me to assess. 

Usually, simple edits take 15-20minutes per image and heavier edits such as removing objects/people or visual artworks can take a few hours (depending on complexity).