
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
A mall plans to invest a sum of money to purchase a batch of fast-selling goods. After market research, it was found that if the goods are sold at the beginning of the month, a profit of 15% can be made, and the principal and profit can be reinvested in other goods to make another 10% profit by the end of the month. If the goods are sold at the end of the month, a profit of 30% can be made, but a storage fee of 700 yuan must be paid. How much is the investment when the profits from these two selling methods are the same?

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