The difference between a set price estimate or a time ranged estimate. I personally like to provide an itemized breakdown of all anticipated parts to be used then I provide a range of labor ( example ) anywhere from 2-4 hours for smaller jobs or maybe 20- 30 hrs for more involved projects, some ask why such a difference in labor, can you just give me a set estimate. The answer to this question is yes, I can provide a set estimate for materials and labor but realistically know