EQUATION : 

 30000 (1.045'" — I) 1000 (».o6^ ) >. 27000 (1.04s" — x) 1 



0.045x1.0452" o.o6xi.o62» < 0.045x1.045" ^ 



18000 4000 



0.045x1.045'^ ~ 0.06 

 30000x13.0 — loooxii.'s = 27000x10.7 + 400,000x0.5 — 66,700 

 RESULT: Conservative lumbering pays, by about $43,700, 

 better than exhaustive lumbering. 



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