Janet currently earns $30/hour x 40 hours/week = $1200/week.
In a month with four weeks, she currently earns $1200/week x 4 weeks/month = $4800/month.
As a freelancer, she would earn $40/hour x 40 hours/week = $1600/week.
In a month with four weeks, she would earn $1600/week x 4 weeks/month = $6400/month.
However, as a freelancer, she would have to pay an extra $25/week x 4 weeks/month = $100/month in FICA taxes.
She would also have to pay $400/month in healthcare premiums.
Therefore, her total expenses as a freelancer would be $100/month + $400/month = $500/month.
To calculate how much more she would make as a freelancer, we subtract her expenses from her earnings:
$6400/month - $500/month = $5900/month.
Therefore, Janet would make $5900 - $4800 = $1100 more per month as a freelancer.
#### 1100
The answer is: 1100
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Janet is trying to decide whether to quit her job and start freelancing. She works 40 hours a week at both jobs. She get paid $30/hour at her current job, and would get paid $40/hour as a freelancer. However, she'd have to pay an extra $25 a week in FICA taxes plus $400/month in healthcare premiums. How much more would Janet make per month as a freelancer if there are four weeks in a month?

### Answer:
