arve esitamine tähendus null.

invoicing▼◼◼◼[UK: ˈɪnvo.ɪs.ɪŋ] [US: ˈɪn.ˈvɔɪs.ɪŋ]

billing▼◼◼◻[UK: ˈbɪl.ɪŋ] [US: ˈbɪl.ɪŋ]