Customizing UPS Shipping Calcuations

Looking for a reminder on which page(s) control the UPS shipping calculation so I can add a modification.

Looking to add a modification that adds $4.50 per package to compensation for the fees UPS is charging us per box (i.e. signature required, delivery confirmation service)

Matt, thank you for the reply.  Productcart built in lets you add Fees per shipment, but not per package.  UPS charges these fees per package.  So when and order has multiple packages shipment become exponentially wrong as package number increases.

ProductCart returns the total rate that includes all of the fees. It should be identical to what you pay if you walk into a UPS Store.  You are correct that our additional fee feature is per order.  So if you wanted to add padding per package you'd need to customize the file "UPSShipRates.asp".

My plan is to add code that multiplies the number of packages x the additional fees value, to add the correct amount to UPS to account for fees per box, that UPS charges, instead of fee per shipment.

Edited by dwatch - 03-February-2016 at 2:47pm

So what I'd like to try to do is find where the "serviceHandlingFee" is added to front and back end of orders, so that I can multiply the serviceHandlingFee set for the shipping service by the number of packages on the order, and add that number to the integrated rate.

I.E. the built in handling fee per shipping option becomes a "per package" fee, instead of a per shipment fee, which better matches how UPS adds fees, as they add fees per package, not per shipment.  so if you add delivery confirmation and signature required to a shipment, UPS charges per package, and currently productcart  built-in shipping integration rate return does not account for this.