How to Map in SAP B1

Hi Experts,

One of my ckient he purchases Raw Material and converts it into finished good and he want to know the cost which occurs in the process of production and where he can see that in SAP B1 and after it is converted into Finished Good it takes some time to be sold and at that time where can he chek his inventory level .

I think in SAP B1 if we enter a item as a raw material it will be shown as raw material till the time it is sold .

Can u plz help me out in this how should i map his process in SAP B1 is that possible or not.

Regards

Naveen.G