Go to Work Orders tab

Select Work Order to edit Cost

Click Time Overview

Select Time Entry to edit Cost

Select Edit

Click Next to get to Editing Time Entry field

Edit Cost in Hourly Rate (Optional) field

Click Done in top right corner

Go to Work Orders tab

Select Work Order to edit Cost

Click Time Overview

Select Time Entry to edit Cost

Edit Cost in Hourly Rate (Optional) field.

Click Update in top right corner