The only remaining items to be charged to each job are the directly traceable costs other than labor. In a repair shop, this category usually includes only the cost of parts, which corresponds to direct material cost in manufacturing. But in a professional service business, there are many directly traceable cost other than labor. Examples are travel, meals, entertainment, long-distance telephone charges, photocopying, and subcontracted services. In tracing these costs to jobs, a crucial link in the accounting system is the fact that many of these costs are incurred by personnel who are reimbursed in cash.