
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 farmer bought $850$ sheep. He then sold $800$ of these sheep for the price he paid for all $850$ sheep. The remaining $50$ sheep were sold at a $10\%$ increase per head compared to the price per head of the first $800$ sheep. Calculate the percent gain on the entire transaction.
A) 6.5%
B) 6.75%
C) 6.875%
D) 7%
E) 7.5%

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