income from a company’s main businesses. It is the difference between a
company’s gross profit and its operating expenses.
"operating income." YourDictionary, n.d. Web. 20 May 2018. <http://www.yourdictionary.com/operating-income>.
operating income. (n.d.). Retrieved May 20th, 2018, from http://www.yourdictionary.com/operating-income