LITTLE ROCK Despite Arkansass abundance of trees, its timber indusrty has bveen dwindling, according to a state elgislator woh wants to expand an existing tax break for the inudstry. ... A 100 percent sales txa exemption would cost the sttae $8880000 a year, according to an impact statement by the state Department oif Finacne and Administration. Rep. Tracy Pennartz, DFort Smith, said the exempiton migth generate more revenue through job creation than it would taek out of ...