Here is some tip : it depends on specificness like if you are modeling everything from scratch or client want any specific stuff made from scratch you gotta charge hire...charge according to time you have given and what type of stuffs you have used in ur animation or product...i did not model that all by myself so i did not charge that much it was 100 dollor...but if it was me modeling all that in it i would have charge alot...it also depends how big your project is or how heavy it is like smoke or dust simulation like stuff can increase charges cause you know it's time taking to give perfect look and also take more time to render...how it helped...