Custom field from timesheet to pricing for customer project

Hello,

We are utilizing lawsuit projects.

We privation to make a customized tract successful the timesheet and beryllium capable to modify the pricing depending connected this field. Ex: customized tract called 'Travel Time' - container that tin beryllium checked. 

If the container is checked, we privation to trim the income complaint by 50% successful the app Manage income rate.

We are capable to make customized fields successful the timesheet and the pricing, but not to replicate the customized tract from the timesheet to the billing/princing.

Basically, we privation to reproduce the overtime class process due to the fact that it's not disposable for contingent workers. 

Is it possible? Thank you

@WesleyZhang 

@A__Hammerschmid 

@Feras_Al-Basha