National income is the sum of compensation of employees, rents, interest, proprietors' income, taxes on production and imports, and Corporate profits.
It represents the portion of the total income earned from current production that is accounted for by U.S. corporations.
A profit margin is a measurement of a company's earnings (or profits) in relation to its revenue in accounting and finance.
Do the math on corporate profits. Operating income is calculated after deducting taxes and interest income or expense. Let's assume that interest costs are $1,000 and taxes total $5,000. Operating income minus taxes and interest costs equals X, or $45,000 minus $5,000 minus $1,000 equals $39,000.
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