Calculate Package Dimensions and display on Scan to Verify Print Screen

We are looking for a feature in ShipStation to be able to calculate the package dimensions within the custom packages that we have set. Ultimately I think it would be helpful to have a way to include the package dimensions either on the packing slip OR the scan to verify and print screen based on the cubic calculation. We get a lot of multi-sku and multi-quantity orders so the product defaults don't help us as much as we would like. Does anyone have suggestions on how to accomplish this given the current ShipStation parameters?