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%.
Numerous local sales and use tax rate changes are scheduled to take effect in Washington on April 1, 2017. Municipal rate changes (with new total rates) The local rate in Kalama will increase by 0.1% to raise revenue for criminal justice and public safety (7.9%) The rate for the retail sale and lease (first 36 months) of motor vehicles remains 7.8%