
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
There are 20 tons of goods to be transported by renting a truck. The truck company has two types of trucks. The large truck can carry 7 tons of goods per trip and costs 600 yuan per trip. The small truck can carry 4 tons per trip and costs 400 yuan per trip. To transport all the goods, at least how much is the transportation fee?

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