Show same provo provo prove plant must necessity un business added cost nave opposite result theory instead ca per per pen thousand feet mail mail mall power line fallen proper wage condition lumber mining long hour cost turnover heavy business payroll expense per due increase efficient vice offset added cost reverse case before present ana short hour effect pay wage mining scarce mining co ire run tn teach green lumber shirk traffic bear possible long win cost increase burden INCREASED INCREASED WAGES WAGES DE DE 1313 prove fallen off hour below average ar mining 9 come pay |