Answer:
![\left[\begin{array}{cccc}&unit \: 23,000&unit \: 21,000&Differential\\Sales\: Revenue&230,000&210,000&-20,000\\manufacturing\:cost&-80,500&-73,500&7,000\\SA \: variable&-55,200&-50,400&4,800\\CM&94,300&86,100&-8,200\\Fixed \:M&-32,200&-32,200&0\\Fixed \:SA&-17,250&-17,250&0\\Net \:Income&44,850&36,650&-8,200\\\end{array}\right]](https://img.qammunity.org/2020/formulas/business/college/avjcqa6oakb2wqpqw34v3in08t73p2irqr.png)
Step-by-step explanation:
We will divide the variable by 23,000 and multiply by 21,000 to convert them to the new activity level.
Then we calculate the contribution margin.
The fixed cost are keep at the same level.
We subtract the fixed cost from contribution margin giving us the net income.
The Net income will decrease by 8,200