Large customers may want to use their own stock numbers when ordering from you. You use the I/C Customer Details screen to specify the stock numbers these customers use to order your inventory items. Each customer item number has a unit of measure, which can reduce confusion during order entry.
If you supply goods to several large outlets, several customer item numbers can be associated with a single inventory item. Since customer item numbers are associated with a specific customer, different customers can use the same number for different inventory items.