An operating expense (opex)[a] is an ongoing cost for running a product, business, or system.[1] Its counterpart, a capital expenditure (capex), is the cost of developing or providing non-consumable parts for the product or system. For example, the purchase of a photocopier involves capex, and the annual paper, toner, power and maintenance costs represents opex.[2] For larger systems like businesses, opex may also include the cost of workers and facility expenses such as rent and utilities.[3]
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