Continuing the previous problem in a slightly different direction, continue to use the Money_allocated cell as a changing cell, but add a constraint that it must be less than or equal to any value, such as $195,000, that is less than its current optimal value. With this constraint, James will again not be able to meet all of the pension fund payments. Create a new objective cell to minimize the total amount of payments not met. The easiest way to do this is with IF functions. Unfortunately, this makes the model non-smooth, and Solver might have trouble finding the optimal solution. Try it and see.