
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 820 sheep. He sold 770 of them for the price paid for the 820 sheep.
The remaining 50 sheep were sold at the same price per head as the other 770.
Based on the cost, the percent gain on the entire transaction is:
**A)** 5.5  
**B)** 6.0  
**C)** 6.5  
**D)** 7.0  
**E)** 7.5

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