WETA eliminated 29 full- and part-time positions this week. There were 15 employees laid off and 14 vacant positions will remain unfilled. Salaries for senior managers have been cut by 13 percent to 15 percent. Those moves and other cost cutting will save the public broadcaster $2.5 million in annual expenses. WETA is based in Arlington, Va., and broadcasts to the Washington, D.C., metro area.