In the product mix model, it makes sense to change the maximum sales constraint to a “minimum sales” constraint, simply by changing the direction of the inequality. Then the input values in row 18 can...

In the product mix model, it makes sense to change the maximum sales constraint to a “minimum sales” constraint, simply by changing the direction of the inequality. Then the input values in row 18 can be considered customer demand that must be met. Make this change and rerun Solver. What do you find? What do you find if you run Solver again, this time making the values in row 18 half their current values?