Answer:
E. increase by $5,000.
Explanation:
For computing the operating income, first, we have to compute the incremental revenue and then deduct the incremental cost, so that the operating income could find out
The incremental revenue would be
= Number of pounds sold × (Selling price per pound - Split-off sale price per pound)
= 5,000 pounds × ($25 - $20)
= 5,000 pounds × $5
= $25,000
And, the additional cost for processed further is $20,000
Now put these price to the above formula
So, the operating income would equal to
= $25,000 - $20,000
= $5,000 increase