if the sales tax reduced from 3 1 / 2 % to 3 1 / 3 %, then what difference does it make to a person who purchases an article with market price of $ 8400?	Choose the most appropriate option
A) 14	B) 24	C) 34	D) 12	E) 13
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) + 3</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) + 3</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(7/2) - (10/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 8_400</gadget>
<output>1_400</output>

<gadget id="calculator">1_400 / 100</gadget>
<output>14</output>

<result>A</result>
if the sales tax reduced from 3 1 / 2 % to 3 1 / 3 %, then what difference does it make to a person who purchases an article with market price of $ 8400?
divide(multiply(subtract(add(divide(1, 2), 3), add(divide(1, 3), 3)), 8400), const_100)
"required difference = [ 3 1 / 2 % of $ 8400 ] – [ 3 1 / 3 % of $ 8400 ] = [ ( 7 / 20 ) - ( 10 / 3 ) ] % of $ 8400 = 1 / 6 % of $ 8400 = $ [ ( 1 / 6 ) * ( 1 / 100 ) * 8400 ] = $ 14 . answer a ."