3 people have been charged for using counterfeit currency at a gas station in North Salem.  New York State Police say the three used bogus $100 and $50 bills Tuesday to buy small items at Coco Farms Shell Gas Station on Route 22.  They received legitimate money in change for the fraudulent transaction. 21-year olds Exondus Barnes and Dalton Daley of Queens and 22-year old Isaiah Styles of Brooklyn were each charged with possession of a forged instrument and petit larceny.  All three were arraigned and ordered held on bond.  They are due back in North Salem Court on June 24th.