Working on Costs and Costs minimization using the microeconomics text book:
here, the book wasn't really being specific about the definition of "cost-minimizing input" and "cost-minimizing output".
I feel like cost-minimizing input is referring to the wage (w) and rental price of capital (r) from the equation of Total Cost = rK + wL.
and I feel like cost-minimizing output is referring to the capital (K) and labor (L).
is my assumption correct? googling didn't work so any insight would be great.