Answer:
-$8,000
Step-by-step explanation:
With regards to the above, we need to compute first the variable cost per unit
Variable cost per unit = $38 per unit + $56 per unit = $94
New contribution margin per unit = $190 per unit - $94 per unit = $96
New unit monthly sales
= 1,000 units + 500 units
= 1,500 units
New total contribution margin
= 1,500 units × $96 per unit
= $144,000
The current total contribution margin
= 1,000 units × $152 per unit
= $152,000
Therefore, the change in total contribution margin and in net operating income
= New total contribution margin - Current total contribution margin
= $144,000 - $152,000
= -$8,000