Mini-Exercise 9-3 (Algo) Calculate operating income and net income LO 9-5 Selling. general, and administrative expenses were $73,000; net sales were $331,500; interest expense was $7,800; research and development expenses were $34,300; net cash provided by operating activities was $86,200; income tax expense was $8,300; cost of goods sold was $180,400. Required: a. Calculate operating income for the period. b. Calculate net income for the period. Complete this question by entering your answers in the tabs below. Calculate net income for the period