Shabana bought 16 dozen ball pens and sold them at a loss equal to S.P of 8 ball pens. Find
i) Her loss percent
ii) S.P of 1 dozen ball pens, if she purchased these 16 dozen ball pens for Rs. 576.
Cost of a dozen pens is Rs 180 and cost of 8 ball pens is Rs 56. Find the ratio of the cost of a pen to the cost of a ball pen.