Selling, general, and administrative expenses were $72,000; net sales were $327,000; interest expense was $7,700; research and development expenses were $33,900; net cash provided by operating activities was $85,200; income tax expense was $8,200; cost of goods sold was $178,200. Required: a. Calculate operating income for the period. Operating expenses:

Selling. general, and administrative expenses were $72,000, net sales were $327,000, interest expense was $7,700; research and development expenses were $33,900; net cash provided by operating activities was $85,200; income tax expense was $8,200; cost of goods sold was $178,200. Required: a. Calculate operating income for the period