Answer and Explanation:
The preparation of the differential analysis is presented below:
Particulars Sell Rough cut Process Differential 
 (Alternative 1) Further into Effect on income
 Finished cut (Alternative 2)
 (Alternative 2)
Revenues 
per 100 board feet $540 $668 $128
Cost per $100
Board ft -$402 -$523 -$121
Income 
or loss 
per 100 board $138 $145 $7
In the case when the product would get process further so there is an increase in revenue by $7