Since 1967, Mack, Roberts & Co., L.L.C. has been providing accounting, planning and consulting services in the Northwest region. Based in Portland, Ore., it offers a range of services, such as audit services, sales tax services, management advisory services, estate and trust tax preparation, to name a few. The firm caters to various customers in the areas, which include retail, wholesale and distribution centers, automobile dealerships, businesses and individuals, real estate developers and contractors, among others.