
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
An enterprise $A$, which consumes ice, purchases it from point $B$ at a price of $a$ rubles per ton. Occasionally, the enterprise has to buy ice from another point $C$ at a price of $1.5a$ rubles per ton. Both suppliers deliver the purchased ice to consumer $A$ themselves, charging $p$ rubles per ton-kilometer for transportation. Ice loss due to melting during transportation is $n / 1000$ of the mass per kilometer. Enterprise $A$ is located between $B$ and $C$, and the cost of each ton of actually received ice is the same (in rubles) when delivered from either point $B$ or $C$. How many rubles does a ton of ice received by enterprise $A$ cost if it is known that the distance from $B$ to $C$ through $A$ is $s$ kilometers?

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