Examlex
Once a GFI has been installed it does not ever have to be tested.
Marginal Revenue
The additional income from selling one more unit of a good; sometimes equal to price.
Marginal Cost
The extra charge incurred when making one more unit of a good or service.
Marginal Revenue
The additional income received from selling one more unit of a product.
Marginal Cost
The additional financial outlay required for producing another unit of a product or service.
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