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Calculating Freight

First of all, the product is retrieved from the Items form so that we can get the unit weight. We already know the carton size so we can calculate the carton weight. The supplier associated with the product is retrieved. If the supplier has no freight code, the freight charge is zero. If the cost's location is listed in the Freight Exceptions section for the supplier, the freight charge is also zero. If there is a freight code and the location is not listed as an exception, we need to check the freight rates for the supplier’s freight code.

The system finds the most appropriate rate by checking location and the department, category and group. It starts by checking rates for the specific location, if none are available it looks at the location’s parent and continue until all locations are checked. If the system finds rates for a valid location, it checks the department, category and group of the fee with the item’s department, category, group recorded against the product (obtained from Items). If a suitable match is made the rate is accepted.

At this point the ‘rate’ is just a number. We need to check the calculation method to determine what to do with this number. If the method is charge per carton, the number is the actual Freight to be added to the Nett Cost. (Remember Nett Cost is already a carton cost.) If the method was a charge per kilogram, the number is multiplied by the carton weight to produce the Freight.

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