Paulsen Corporation sued Dorr for ten fuel oil deliveries not paid for. Dorr denied that the deliveries were made. At trial, Paulsen calls its office manager, Wicks, to testify that Paulsen employees always record each delivery in duplicate, give one copy to the customer, and place the other copy in Paulsen's files; that he (Wicks) is the custodian of those files; and that his examination of the files before coming to court revealed that the ten deliveries were made. Wicks's testimony that the invoices show ten deliveries is 
admissible, because it is based on regularly kept business records.  admissible, because Wicks has first- hand knowledge of the contents of the records.  inadmissible, because the records must be produced in order to prove their contents.  inadmissible, because the records are self-serving. 