Selling, general, and administrative expenses were $80,000; net sales were $390,000; interest expense was $16,000; research and development expenses were $34,000; net cash provided by operating activities was $42,000; income tax expense was $10,000; cost of goods sold was $220,000.
1. Gross profit for the period was .

$428,000

Explanation:

Gross profit for the period = total sales generated (revenue) - total expenses

Expenses incurred as as follows;

-Selling, general, and administrative expenses = $80,000

-Interest expense = $16,000

-Research and development expenses = $34,000

-Net cash provided by operating activities = $42,000

Income tax expense was $10,000

Total expenses incurred = $182,000

Total sales generated (revenue)

- Net sales = $390,000

- Cost of goods sold = $220,000

Total sales generated = $610,000

Gross profit for the period = $610,000 - $182,000

Gross profit for the period = $428,000

answer; is usually (less than) the socially optimal level of consumption;

fractionally backed paper money

fiat money

paper money

metallic money