Question 178391
1.

take the total amount (169.82) subtract the service call fee (29.96). Then devide the amount (139.86) by hourly pay (39.96). 
                    3.50
 169.82     39.96/139.86
- 29.96
 139.86

 He worked for 3.5 hrs or 3 1/2 hrs

I cant help you an number 2 sorry.