by COBS Tech Support » Fri Aug 11, 2006 6:59 pm
Assuming these items have different product codes, assign excise to one tax rate that also calculates GST, and create a second tax rate for GST, and do not assign any excise to that tax rate. Then assign the tax rate with the linked excise to the stock item that represents the 200 litre drum. Assign the tax rate without excise to the stock item representing the 20 litre drum.
If you are using the same product item code, but specifying a different unit of sale only when invoicing, then as there is no system in CAPITAL 7.4 to automatically change the tax rate based on the unit quantity sold, the operator will have to manually enter the correct tax rate against the item. If this isn't acceptable, a script would have to be written to check, validate and select the desired tax rate based on the unit of measure of the sale.