A new advertising agency serves a wide range of clients including manufacturers, restaurants, service businesses, department stores, and other retail establishments. The accounting system the advertising agency has most likely adopted for its record keeping in accumulating costs is:

A. Relevant costing.

B. Operation costing.

C. Job-order costing.

D. Process costing.

C. Job - order costing

Explanation:

Job - order costing -

It is used by the organization, when the goods and services of the organization are readily identifies by separate batches or units.

The agency that will advertise accumulates its cost through the client.

The method of job - order costing is the most apt system for a non - manufacturing firms.

Hence, from the data of the question, the correct answer is (C) Job - order costing.