Paul Bunyon Lumber Co. produces several products that can be sold at the split-off point or processed further and then sold. The following results are from a recent period: Sales Value Additional Sales Value after Product at Split-off Variable Costs Further Processing Green lumber $159,600 $24,000 $178,000 Rough lumber 124,000 28,200 173,600 Sawdust 102,000 19,600 130,000 Which products should be processed further? Select one a. Green lumber and rough lumber b. Rough lumber and sawdust C. All three products d. Green lumber and sawdust