Central excise

cum duty wholesaleprice including sales tax Rs. 2500      - Rs. 15000

normal secondary packing cost                                                - Rs. 1000

cost of special secondary packing                                           - Rs. 1500

cost of durable and returnable packing                                    - Rs. 1500

freight - Rs. 1250   insurance on freight - Rs. 200 trade discount (normal practice)  -Rs. 1500 central excise rate -10% Adv.

compute the assessable value