Contribution Margin is Net Sales minus the variable product costs and the variable period expenses. The Contribution Margin Ratio is the Contribution Margin as a percentage of Net Sales.
Let's illustrate the difference between gross margin and contribution margin with the following information: company had Net Sales of $600,000 during the past year. Its inventory of goods was the same quantity at the beginning and at the end of year. Its Cost of Goods Sold consisted of $120,000 of variable costs and $200,000 of fixed costs. Its selling and administrative expenses were $40,000 of variable and $150,000 of fixed expenses.
The company's Gross Margin is: Net Sales of $600,000 minus its Cost of Goods Sold of $320,000 ($120,000 + $200,000) for a Gross Profit of $280,000 ($600,000 - $320,000). The Gross Margin or Gross Profit Percentage is the Gross Profit of $280,000 divided by $600,000, or 46.7%.
The company's Contribution Margin is: Net Sales of $600,000 minus the variable product costs of $120,000 and the variable expenses of $40,000 for a Contribution Margin of $440,000. The Contribution Margin Ratio is 73.3% ($440,000 divided by $600,000).
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