1. A method implemented at least in part by a computer, the method comprising: allocating a plurality of accounting cost senders to a plurality of different tasks; and within the tasks, locally working through the accounting cost senders via a method comprising (a)-(b): (a) for a given accounting cost sender, locally identifying one or more pinpoint accounting cost receivers; and (b) locally distributing accounting costs for the given accounting cost sender among the pinpoint accounting cost receivers.