How to get real cost price of products.
I am purchasing a raw product from supplier, after that I am sending this product to supplier1 for painting then after same products I am sending to the supplier2 for polishing. supplier cost is always fluctuated and also some time we need to pass this product to 3rd supplier as well for some other processing.
My question is.
1) how can I get real cost price of my product?
Your prompt reply would be appreciated.