How does gross margin differ from gross profit?

How does gross margin differ from gross profit?
GROSS PROFITGross Profit is the difference between Net Sales and Cost of Goods Sold. First, Net Sales is calculated by subtracting Sales returns and allowances from Sales.Sales - Sales Returns and Allowances = Net SalesNext, Gross Profit is calculated by subtracting Cost of Goods Sold from Net Sales.Net Sales - Cost of Goods Sold = Gross ProfitGross Profit is expressed as a dollar figure, like $100. If Cost of Goods Sold exceeds Net Sales, Gross Profit figure will be negative.PROFIT MARGINProfit Margin is not a dollar figure. Profit Margin shows the percentage of each sales dollar that results in net income.First, Net Income is calculated by subtracting Operating Expenses from Gross Profit.Gross Profit - Operating Expenses = Net IncomeNext, the Profit Margin ratio is constructed, and the result is expressed as percentage.Net Income : Net Sales = Profit MarginFor example, assume that Net Income equals $10,000 on Net Sales of $100,000. In this case Profit Margin equals$10,000 : $100,000 = 0.10 = 10%.GROSS PROFIT MARGINTerms "Gross margin" and "Gross profit margin" have been invented by some enterprising accounting students. These terms are part of accounting jargon in some colleges. The meaning of those terms is very liberal, - it means whatever one wants it to mean.For example, "Gross Profit" may mean either Gross Profit or Profit Margin. Most likely, it means that the speaker does not know the meaning of either one of the terms. But "Gross Profit Margin" surely takes the cake. It's just a mouthful piece.