Hi Guys I need some help on how to price excavating a parking strip for one of my mowing clients. The space to be excavated is 5 feet wide by 70 long. There is currently grass in it, so the grass and about 3 inches of soil need to be taken out and hauled off, about 6 inches total. I plan on renting a mini ex to help me tear it out. Is there a good formula or estimation tool to help me know what to charge? Any and all help would be greatly appreciated!!! Thanks!