Festival season is around the corner, sales promotional offers will be a common sight in the market place. More often, promotional schemes are used as effective sales strategy to attract the customer to buy their product. Among the various promotional offers, Buy One-Get One Free, Free gifts, Flat discounts, and so on, are the popular schemes. In case of newer products, in order to gain market penetration, the concept of free samples are adopted. Under this, products are supplied for free as a sample, and this is very common in the pharmaceutical industry.