
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Michael subscribes to an internet service that charges a fixed monthly fee plus a per-hour fee for usage. In February, his bill was $18.60, and in March, his bill rose to $30.90 because he used three times as much internet time as in February. Calculate the fixed monthly fee.

Present the answer in LaTex format: \boxed{Your answer}
user