I'm using Crystal Reports XI. I've created a report that balances two columns of financial transactions from two different sources. I've created a formula field that calculates the variance between the two numbers. The user would like to show the total variance as a percentage of total transactions. In the Insert Summary dialog box is a check box "show as a percentage of" and a dropdown list box. The checkbox and dropdown list box are grayed out. How do I get this to work?