It’s big-band jazz times two when the Carson High Jazz Band and the Mile High Jazz Band present their 10th annual combined concert, the Mile High-Carson High Jazz Extravaganza, at 7:30 p.m. Jan. 29 in the Bob Boldrick Theater at the Carson City Community Center, 851 E. William St. The Extravaganza is sponsored by the Mile High Jazz Band Association and the Carson City Band Association to benefit Carson High Jazz Band programs.Tickets prices are $12 general admission, $10 students and seniors (62 and older), and $5 for youth age 12 and younger. Tickets can be purchased in advance from …