operating expense
US /ˈɑː.pə.reɪ.tɪŋ ɪkˈspens/
UK /ˈɑː.pə.reɪ.tɪŋ ɪkˈspens/

1.
an expense incurred in carrying out an organization's day-to-day activities, but not directly involved in producing goods or services.
:
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Rent, utilities, and salaries are common operating expenses for a business.
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Reducing operating expenses can significantly improve a company's profitability.