Answer:
(A) $20,000 net income
Step-by-step explanation:
![Sales * $Contribution Margin Ratio = Total Contribution](https://img.qammunity.org/2020/formulas/business/college/tt5m0y4f3c4nkfigxd5f1yaafawggkbg4n.png)
500,000 * 20% = 100,000
![Contribution - Fixed \: Cost = Result \: for \: the \: period](https://img.qammunity.org/2020/formulas/business/college/9tfk5pszhjkbebt6c8us990g7djh6ls5c9.png)
100,000 - 80,000 = 20,000 net income
Remember: The contribution margin represent how much contribution bring to the table $1 of sales.
So if CMR equals to 20% each dollar generates $0.20 of contribution