Optimum combination of resources
The firm can maximise output given costs. That is when the entrepreneur attains the highest isoquant given a particular Isocost.
At the point of tangency the absolute slope of Isoquant will be equal to the slope of the Isocost. Two conditions should however prevail, namely:
i. The necessary condition is that
w/r = MPL/MPk or MPL/PL = MPk/Pk
ii. The sufficient condition is that the Isoquant must be convex to the Isocost point of Tangency.