Multiple Variables
You can create multiple variables against a variable field.
For example, you can create a variable field called Acceptable Cost that contains two variables - Low Value and High Value. You then define a metric based on two criteria: The Total Cost being greater than Low Value, and less than or equal to High Value.
At run-time, the user is prompted for the field that is being used in the calculation as well as the two variable costs being used in the metric calculation.