Answer:
Knowledge of Office Administration is necessary to perform all the tasks outlined in the question.
Step-by-step explanation:
Office administrative duties revolve around managing and distributing information within an office. This generally includes answering phones, taking memos and maintaining files.
The clerical employee received office administration training to enable him perform record-keeping tasks, maintains employee attendance records, schedules salespeople's work shifts, and monitors the use of office supplies for reordering.