A measure will project (locally inside the report) unless it has been set to database delegated via Universe Designer.
In other words, just drag a measure in the table footer, and it should project (meaning: roll up locally inside the report), no new formulas are needed. This has been a basic functionality of measures for years.
See also here about SQL aggregation versus projection: diff between Select SUM (Table. Field) & Select Table. F
See also about input/output context in formuals: Dave's Adventures in Business Intelligence » Calculation Context Part I: Overview
P.S.: After all WebIntelligence is NOT cumbersome Crystal Reports 
… 1:0 for Webi 
Andreas 
(BOB member since 2002-06-20)