(Salem, OR)  --  The state of Oregon is now collecting a 25-percent tax on recreational marijuana sales.  Anyone who purchases legal pot without a medical marijuana card will have to pay the tax.  Officials say 40 percent of the tax revenue will go to a common school fund, 20 percent will be used for alcohol- and drug-treatment programs, and 15 percent will go toward funding State Police, local governments, and the Oregon Health Authority.  The OHA is overseeing recreational pot sales until October, when the Oregon Liquor Control Commission will assume that duty.