No prolem Mr. Neelima,
we're a recycling company, we receive orders from customers to dispose or recycle materials, then we receive the materials into our stock to start working on it later.
we start processing the received material, the result can be a usable material, or a material that is safe for disposal.
If we were able to produce a usable product, we can give it back to customer, or sell it as one of our products.
we know the sequence of operations that we have to do, but the problem is that we don't know for sure any information about quantities or materials.
I hope it's more clear now.
Thank you
A.Shafei