Answer and Explanation:
The computation of the incremental income is as follows;
Particulars Sale as scrap Rework
Sales of reworked units
(16,000 × $8.60) $137,600
Sales of scrap units
(16,000 × $3.10) $49,600
Cost to rework units
(16,000 × $4.50) ($72,000)
Incremental income (loss) $49,600 $65,600