Which of the following is a correct equation for estimating cost of an activity assuming, I= Intensity or number of a resource type (planner, developer, coder....), VOW= Volume of Work (units: tons, feet, miles .....), P=Productivity( units/time unit produced by a resource), R=rate for a resource ($/time unit) Cost = (VOW/P)xIxR Cost = Ix(VOWxP)/R Cost = { (VOW/P)}xR None of the above