Estimating expansion in an economy requires objective method for separating changes in ostensible costs on a typical arrangement of labor and products, and recognizing them from those cost shifts coming about because of changes in worth like volume, quality, or execution. For instance, if the cost of a jar of corn changes from $0.90 to $100 throughout a year, with no adjustment of value, then, at that point, this cost contrast addresses expansion. This single value change wouldn't, be that as it may, address general expansion in a general economy, To qua ntity in general expansion, the value change of a huge "container" of agent labor and products is estimated, This is the motivation behind