The reporting functionality in Luminate CRM is controlled by Salesforce code.  We do not have any details directly in our documentation, but you can utilize Salesforce reporting help: https://help.salesforce.com/HTViewHelpDoc?id=reports_builder_fields_formulas.htm&language=en_US

Useful formulas for Salesforce: https://help.salesforce.com/help/pdfs/en/salesforce_useful_formula_fields.pdf