Task: Question Answering
Input (English): Problem: daniel went to a shop and bought things worth rs . 25 , 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 ? 
Options: a ) 19.7 , b ) 20 , c ) 21.3 , d ) 21.5 , e ) 22
Output (English): a