Amit bought a TV for Rs 17280 at a discount of $20 \%$ followed by a $20 \%$ sales tax. Had a $10 \%$ discount been offered instead, followed by a $10 \%$ sales tax, he would have bought it at a price which, including the sales tax, would have been
(1) Rs 170 less
(2) Rs 140 less
(3) Rs 280 more
(4) Rs 540 more