
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
Personal income from manuscript remuneration is taxed based on the remainder after stipulated expenses are deducted from the income earned on each occasion. For income not exceeding 4000 yuan each time, a fixed amount of 800 yuan is deducted; for income exceeding 4000 yuan each time, a rate of 20% is deducted from the expenses. A proportional tax rate of 20% applies, and the tax payable is further reduced by 30% as per regulations. The calculation formulas are as follows:
- For each income not exceeding 4000 yuan: Tax payable = (Income - 800) × 20% × (1 - 30%)
- For each income over 4000 yuan: Tax payable = Income × (1 - 20%) × 20% × (1 - 30%)

It is known that an individual pays 280 yuan in taxes for the publication of a manuscript. What is this person's manuscript fee (before tax deduction)?

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