$.$ Post$-$Optimal Analysis for Cases Affecting Both Optimality and Feasibility. Suppose that you are given the following simultaneous changes in the Reddy Mikks model: The revenue per ton of exterior and interior paints are $$2000$ and $$5000,$ respectively, and the maximum daily availabilities of raw materials, M$1$ and M$2,$ are $35$ and $10$ tons, respectively.