assessable value n duty liablilty

product sold -- @ Rs500 per unit

price includes CST @ 2%

average freight irrespecive of place of deleivery - 100%

actual freight incured on product for delivery at buyers place - 150

excise duty - 8%

as per my opinion

cst is = 9.8  rounded off to 10

value before CST is 500 - 10= 490

as freight from place of delivery to buyers place should be excluded for valuation purpose... assessable value inclusive of excise duty is = 490 - 150 = 340

so now excise duty is =  340 * 8\108= 25 Rs

basic price =                     465

less: freight                       (150)

                                         ------------

AV                    =               315

add: ED   @ 8%                25

                                         --------------

 value before CST =   340

and without freight

add: freight                 150

                                    --------------

value for CST           490

cst @ 2%                    10

                                 ----------------

TOTAL PRICE         500

                                ------------

PLEASE LET ME KNOW IF AM WRONG IN AY OF THE CALCULATING PROCEDURE.....

I SAW MANY ANSWERS CALCULATING cst WITHOUT ADING BACK THE FREIGHT UPTO PLACE OF DELIVERY, WHICH IS DEDCUTED TO CALCULATE EXCISE DUTY