\(\begin{array}{c|c} & N \\ \hline \text{Opening stock:} & \\ \text{- raw materials} & 6,500 \\ \text{-work-in-progress} & 2,500 \\ \text{Closing Stock:} & \\ \text{- raw materials} & 4,000 \\ \text{-work-in-progress} & 1,000 \\ \text{Purchases of raw materials} & 12,500 \\ \text{Manufacturing wages} & 2,000 \\ \text{Factory rent} & 500\end{array}\) What is the cost of production?

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