Quadri-, quadru-, quadr-is a Latin prefix related to the verb quadrare âto make squareâ, quadratus âsquareâ etc. Quad is simply an English shortening of quadrangle, quadruplet etc. So quadri-and quad are actually the same word.
The Washington state sales tax rate is 6.5% , and the average WA sales tax after local surtaxes is 8.89% 1  . Groceries and prescription drugs are exempt from the Washington sales tax. 2  Counties and cities can charge an additional local sales tax of up to 3.1%, for a maximum possible combined sales tax of 9.6%.
State and local sales taxes; business license fees; local marijuana taxes. Washington. 37 percent excise tax on marijuana sales price. Previously a 25 percent tax on producer sales to processors, another 25 percent tax on processor sales to retailers, and a further 25 percent tax on retailer sales to customers. State Business & Occupation (B&O) taxes; state and local sales taxes.