Charge Calculation Ax 2012 R3 Inbound Process


I need help in Ax 2012 R3 TMS. I am calculating charge from TMS process and applying it on purchase order. System is applying charges only its working only if I put weight in item master. As I remove the weight I cannot apply charges from TMS on Purchase Order.

What I think here to calculate the load weight and other physical dimension it is required but I want to override this. Please help me in this. I don’t want to put any dimension or weight with item master. Is there any check mark or way that I can override that dimension requirement.