Pricing will vary by market. The $20 per hours seems low to me. Our restoration company was at $24.50 per hour 13 years ago in rural Tennessee. That was a low priced market. I know the rate was higher in major cities.
Pinosan is correct. Check Xactimate. That is a program that can add thousands to your job tickets if you know your way around it .
xactimate is low in pricing if you don't use it correctly. The above quoted pricing wouldn't cover the cost of an employee when you factor in all the expenses employees have to the employer. I always say if you can take your techs hourly wage and multiply by 3 will keep your company profitable.
Maybe this can help. I put this together in excel as a self pay pricing guide for my lead technicians. The prices are based on Xactimate rates for the Denver area. I made this a while ago so the rates might be different now but it should give you a basic idea.
If you would like the excel document so you can make the changes you need just let me know.