________ is a situation in which a good or service is produced at the lowest possible cost

On January 1, 2015, United Delivery had trucks valued at $1.3 million. During 2015, United Delivery purchased new trucks valued at $500,000. If the value of the trucks on December 31, 2015 was $1

5 million, what is the amount of its net investment and its depreciation during 2015?

In the short run, the equilibrium level of real GDP

A) is necessarily less than potential GDP. B) is necessarily equal to potential GDP. C) is necessarily greater than potential GDP. D) could be less than, equal to, or greater than potential GDP.