Shanay saw that the campus bookstore is having a special on pads of computation paper normally priced at $3.75 a pad, now on sale for $3.50 a pad. The sale is unusual and he assumes the paper will not be on sale again. On the other hand, he expects there will be no increase in the $3.75 regular price, even though the inflation rate is .75% every three months. Shanay believes competition in the paper industry will keep wholesale and retail prices constant. He uses a pad of paper every 3 months. He considers 9% a suitable MARR. He will buy one pad for his immediate needs. How many extra pads of computation paper should he buy? Assume 9% is the effective annual discount rate.