Selling, general, and administrative expenses were $56,000; net sales were $254,600; interest expense was $6,000; research and development expenses were $26,600; net cash provided by operating activities was $66,900; income tax expense was $6,400; cost of goods sold was $138,900. Required: a. Calculate operating income for the period.

b. Calculate net income for the period.

Operating expenses: Interest expense Income tax expense