Plaintiffs argue in favor of aggregate damages because doing so can simplify their damages proof & administrate management of the case.
at the same time however, while aggregate damages calculations can be simpler, they are less precise because they do not take into account variations among the plaintiff class that will likely reduce the damages, potentially by a large amount.
court confronts the question whethere plaintiffs can aggregate damages at trial so that the jury can make a single determination of damages applicable to all plaintiffs in the class, notwithstanding the fact that the damages can vary widely accross the class.