
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 rancher bought $625$ cows. He sold $600$ of them for the price he paid for all $625$ cows. The remaining $25$ cows were sold at the same price per head as the other $600$. Calculate the percent gain or loss on the entire transaction.
A) 4.0%
B) 4.17%
C) 5%
D) 6%
E) 6.5%

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