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