
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
Li relies on his income from part-time work to pay for his college expenses. Below is Li's income and expenditure table for a week, with income recorded as positive and expenditure as negative (unit: yuan).

| Day    | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|--------|--------|---------|-----------|----------|--------|----------|--------|
| Income | +65    | +68     | +50       | +66      | +50    | +75      | +74    |
| Expenditure | -60 | -64     | -63       | -58      | -60    | -64      | -65    |

$(1)$ By the end of the weekend, how much surplus does Li have?  
$(2)$ Based on the expenditure levels above, estimate how much income Li needs per month (calculated based on 30 days) to maintain normal expenses?

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