How do I get the invoice amount of Material based on the Sales Document number?

How can I get the details of travel expenses charged against a Sales Document number in SAP? We use SAP Concur where employees charge travel expenses against the SD number. Where can I find this data in SAP? Is there any transaction to get this data?...

How can I get the Invoice costs (items procured against a Sales order) related to a Sales Document number (using the SD number of the Customer)? I use know the transaction ME2K. It gives me the details based on PO price and not the Invoice price. In ...