Start from clicking on Bookings > All Bookings and pick the booking you need:
2. Once inside the booking go to the "Price" table and lay the mouse at the item you need to eliminate. That would bring you suspensive dots on which you need to click.
The message "Remove price item" would appear and you should click on that as well.
3. It will lead you to the following:
Select Accept to finalise.
In case you do not have permission to proceed with this transaction, inform your administrator so he can enable you the "Can remove booking price item " permission.