
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
Two trucks are transporting identical sacks of flour from France to Spain. The first truck carries 118 sacks, and the second one carries only 40. Since the drivers of these trucks lack the pesetas to pay the customs duty, the first driver leaves 10 sacks with the customs officers, after which they only need to pay 800 pesetas. The second driver does similarly, but he leaves only 4 sacks and the customs officer pays him an additional 800 pesetas.

How much does each sack of flour cost, given that the customs officers take exactly the amount of flour needed to pay the customs duty in full?

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