In SAP 2007B, in Purchase process, we have Profit Centre cloumn.
In sales we have both Profit Centre and COGS.
In sales process should we enter different profit centres or can it be the same?
It can be the same. However, if you set it differenetly, you can have more categorized view under each centers. This is based on your business process. Every business has their own ways to look info their financial data.