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The SQL Server DBMS supports the SQL BEFORE trigger.
Variable Costs
Expenses that change in proportion to the activity or volume of production, sales, or services rendered.
Fixed Costs
Charges that are unaffected by production or sales volume, for example, monthly rent or payroll expenses.
Selling Price
The price at which a product or service is offered to customers.
Contribution Margin Ratio
The percentage of sales revenue that exceeds variable costs, indicating the portion of sales available to cover fixed costs and generate profit.
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