This is represented with at time entry that contains file, duration and with Billing rate with 0.00 value/amount.
See steps below. If an Amicus user would want to process an list of time entries to change its Billing rate to something else.
Go to Billing tab
Select Time, Fees & Expense
Select the Time entries to change
Click on Tools > Mass Time Entry Change
Go To Rate Value to
Enter the new Billing rate amount
Note: The changes will only be applied on the time entries selected.