The Amount column must show the number of items ordered multiplied by the unit price. You perform calculations in LiveCycle Designer ES using FormCalc or JavaScript. We will use FormCalc for this calculation. FormCalc is a simple yet powerful calculation language modeled on common spreadsheet software. Its purpose is to facilitate fast and efficient form design without requiring a knowledge of traditional scripting techniques or languages. You use the Script Editor to enter calculations for the different objects on the form.