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Electrons will not pair in degenerate orbitals if an empty orbital is available and, according to Hund's rule, the degenerate orbitals must all contain one electron before any of them can contain two electrons.
Average Fixed Cost
The fixed costs of production (e.g., rent, salaries) divided by the quantity of output produced; these costs decline as production increases.
Average Variable Cost
Total variable costs divided by the quantity of output, showing the variable cost per unit of output.
Marginal Cost
The price to produce an additional unit of a product or service.
Total Costs
The total expense of manufacturing that encompasses all constant and fluctuating costs.
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