In Excel, you can change display options to show the formulas used to calculate measures in a planning worksheet.
As a planner, you can view formulas to see how the measures you work with are derived.
As an administrator, you can customize planning worksheets to add measures, along with formulas for calculating their values from other data in the Integrated Operational Planning database.
The arguments (inputs) to functions used in formulas may be numbers, alphanumeric characters, variables, logical values (true or false), cell locations, or other formulas.
See:
Functions for detailed information on the Integrated Operational Planning calculation functions