Opportunity Cost: The value of the next best alternative foregone when making a choice. For every resource used, there is an opportunity cost associated with it which contributes to MRC.
Supply Curve: Shows how much quantity producers are willing and able to supply at different prices. The shape and slope of the supply curve help determine how MRC changes as firms increase or decrease their use of resources.
Economies and Diseconomies of Scale: Economies occur when increasing production lowers average costs, while diseconomies occur when increasing production raises average costs. MRC is influenced by economies and diseconomies of scale as they affect the cost of resources.