what to charge to take care of show cattle

I have traveled on and off for the past 8 years working on show/sale cattle for alot of big time places. I am starting  a new gig. Ive got a 7 stall barn with 4 really big nice lots, and I was wondering what I should charge to feed, wash, blow, and all the daily stuff that comes with taking care of show/sale cattle?
If i pay for the feed?
if they pay for the feed?
any suggestions are greatly appreciated

You charge them for the feed plus 10 percent and them figure how much time you spend with each calf and charge them an hourly rate. if your time is worth  10 or 20 an hour and charge them. (If you spend an hour and a half a day with each calf then charge them that way. Do not over charge what ever you do. it takes away from you intergity.