Could someone answer these 2 fill in the blank questions for me so that I can study them for my final? Short-run production decision of a firm in any type of market structure is to produce at the output level where marginal ______________ is equal to marginal _________. The costs, which reflect the value of the resources used even if no direct payments are made, are called ___________________ costs, whereas the costs, which reflect the direct payments made for the use of resources in a production process, are called __________________ costs