MANUAL PRORATION D O E S N O T FUNCTION PROPERLY !!!

If I'm not mistaken we talking about ACCOUNTING software here. All business transactions should be processed properly without catting any corners.
In addition to Freight Custom duties require manual proration as well. Duty rates fluctuate from 0% to 11,5% for different items and calculated on separate XL worksheet. I'm not even mentioning that landed cost components could be a defined as one of the item properties in IC.

At least please fix your tedious manual proration method.

Victor