Need Help with this river rock bid

[peapod1125]

I am bidding a job where I have to kill existing grass and spread 2B River stone. The job is on the edge of a parking lot so I can use a bobcat. I have to rent it at $165 a day. The area is 475 feet x 6.5 feet. I figured around 50 or so yards of stone so it is plenty deep enough. Thats at $30 a yard. I will need about $150 worth of weed mat also. My question is how much to mark everything up. My labor shoun not be more than $250 not including myself. Labor and materials I estimate I am around $2500. I just need help with mark up and charging for my labor/judging amount of time to do the job. Thanks for any help in advance.