Answer:
Increamental net income = $529,920-$478.610 = $51310
Step-by-step explanation:
Total sales revenue before the further processing = $22.9 * 20,900 =
$478.610
Total net sales revenue after the further processing = ($30.9 *12900)+($20,9*6900)-$12,900 = $529,920
Increamental net income = $529,920-$478.610 = $51310