Amount of additional duty of customs u/s 3(1)

Assessable value of certain goods imported from USA is `15,00,000. The packet contains 15,000 pieces with maximum retail price `150 each. The goods are assessable under section 4A of the Central Excise Act, 1944, after allowing an abatement of 40%. The excise duty rate is 8% ad valorem. Calculate the amount of additional duty of customs u/s 3(1) of the Customs Tariff Act, 1975 assuming basic customs duty @ 10% ad valorem.