
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

In our country, personal income tax on wages and salaries is calculated in segments. If the total income does not exceed 800 yuan, the personal income tax on wages and salaries is exempted; for the part exceeding 800 yuan, tax is levied. Let the taxable monthly amount be \( x \), \( x = \) total monthly income - 800 yuan, and see the table below for the tax rate:

1. If the taxable amount is \( f(x) \), express the calculation formula for the tax amount \( f(x) \) in levels 1-3 using a piecewise function.
2. For a person whose total income for March 2000 is 3000 yuan, calculate how much personal income tax this person should pay in March.

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