Subscription fee for a month = $ 5
Subscription fee for a writer who signs up = $ 5
Number of subscribers last month = 200
New members who joined the website = 40
Number of subscribers who left the website = 10
Hence, total subscribers in the present time =
![200+40-10=230](https://img.qammunity.org/2019/formulas/mathematics/high-school/8ic04cqz6sfxqew581c5l7j9hfc2qu0sns.png)
Now, total subscription fee received this month =
![5*230=1150](https://img.qammunity.org/2019/formulas/mathematics/high-school/ueqmjx1ggarhn14l6wb5rdtvow91qh08py.png)
Hence, the answer is $1150.