Your Extras will be displayed in your Booking Form identically to how they appear in this list.
You can use your own icon (a PNG or JPEG image file) for your Extra on the cleaning booking form: Go to Settings -> Services -> Extras Click the edit icon for the Extra you want to add your [...]
Go to Settings -> Extras Click Add New Enter values for Name and Price. Click Save.
Launch27 does not let you permanently delete an Extra, but instead lets you archive it. Go to Settings -> Extras Click the Settings button (gear icon) next to the Extra you want to delete [...]