
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
Xiao Ming went to the store to buy boxes. If he buys one box of each of the three models $A$, $B$, and $C$, it will cost a total of $9$ yuan. If he buys $3$ boxes of model $A$, $2$ boxes of model $B$, and $1$ box of model $C$, it will cost a total of $16$ yuan. Then, one box of model $C$ is more expensive than one box of model $A$ by ______ yuan.

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