STOCK PURCHASE AGREEMENT AMONG PAUL CHARLES JOY II, TRUSTEE OF THE PAUL C. JOY AND KATHRYN B. JOY TRUST – FUND B AND KATHRYN BLAKE JOY, TRUSTEE OF THE PAUL C. JOY AND KATHRYN B. JOY TRUST - FUND C AND HOWCO DISTRIBUTING CO., A WASHINGTON CORPORATION...