Subject: vol
From: Subir Chakma <[email-masked]>
To: Reshma Singh <[email-masked]>
Date: Tue, 5 Feb 2013 09:49:56 +0530 (IST)

Please be advised that the shipment cost can be based on the dead weight or on the volumetric weigh, whichever is the greater. This is due to the standard for Air freight transport which uses volumetric weight which factors in the dimensions on the package as well. As mentioned, the carrier will then take the greater of the dead weight and the volumetric weight. 
In this case the dead weight of your shipment is 3.45 kg but the volumetric weight is 7.97 kg, so we charge the second one as it is the heavier. 
For further information about the volumetric weight, please see the link below: 
http://www.borderlinx.com/pages/faq/volumetric-weight 

Rgds Subir