value change of an enormous container" of agent labor and products is estimated. This is the motivation behind a cost list, which is the joined cost of a "container" of numerous labor and products. The joined cost is the amount of the weighted costs of things in the "container". A weighted cost is determined by duplicating the unit cost of a thing by the quantity of that thing the normal shopper buys. Weighted estimating is a viable way to estimating the effect of individual unit cost changes on the economy's general expansion. The Consumer Price Index, for instance, utilizes