`V_T = ( "P" * "Y" )/ "M" `

Enter a value for all fields

This equation is used to compute how fast money passes from one holder to the next.
It basically computes  the frequency at which the average unit of currency is used to purchase newly domestically-produced goods and services within a given time period.

Reference.
Money Velocity. Federal Reserve Bank of St. Louis. https://research.stlouisfed.org/fred2/series/M2V Retrieved October 28, 2013.