"Divide your transaction commodity wise, Seperate transaction for each commodityy"
This way a single transaction in the current system would be equal to 6 to 10 transactions in the new system. Further increasing the problems many fold.
Please refer Central Excise Tariff (www.cbec.gov.in) chapter wise Tariff item,descripttion of goods has been provided. HSN Code will be derived from this list only for India.