Helen went to the stationers and bought things worth Euro 21, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items? Choose the correct choice from the following choices
A) uro 16.70	B) uro 19.70	C) uro 13.70	D) uro 18.70	E) uro 15.70
E   Euro 15.70   Let the amount taxable purchases be Euro x.   Then, 6% of x = 30/100   x = (30/100 x 100/6) = 5.   Cost of tax free items = uro 15.70uro [  21 - (5 + 0.30)= 
<gadget id="calculator">  21 - (5 + 0.30)</gadget>
<output>15.7</output>
uro 15.70uro 15.70
<result>E</result>
Helen went to the stationers and bought things worth Euro 21, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?