Explanation, analysis and understanding of subtopics, such as demand, supply, price elasticity and income, affect customers. Demand is the desire for a product that a person can purchase at the given price. Demand is an important tool in the market. The law of demand states that as the price of a product increases, the demand for that particular product decreases. Price and quantity demanded have an inverse relationship with each other. Price elasticity of demand is another concept showing a change in the responsiveness of a good or service due to a change in its price. Price elasticity of demand can be calculated by this formula:- % change in quantity demanded% change in priceSupply is another tool used in the market. Supply is the willingness of a supplier to supply its product at the given price. The law of supply states that if there is an increase in price, there will also be an increase in supply. In this case, price and quantity supplied have a direct relationship. Price elasticity of supply is the responsiveness or elasticity of the quantity supplied of a good or service to a change in its price. Demand and supply play an important role in the economy. This helps in determining the price of a product with the forces of supply and demand. An equilibrium point is reached, where the quantity demanded equals the quantity supplied, represented by the intersection of the demand curve and the supply curve, as shown below: - A supermarket in Malaysia, commonly called “Giant” is a very large supplier. It offers a wide variety of products including food, clothing, electronics, and more. Their target audience is mainly middle class people but they make sure to provide such products...... middle of paper ......we have discussed the above mentioned points we can conclude that , supermarkets like Giant have a greater risk of holding large stocks, as it could become a threat to them, if there is a change in taste and fashion for their customers. They should use the “just in time method” because it can help and prevent threats. When it comes to grocery stores like Cyberia Market, we can conclude that they operate in a niche market. They can strengthen their relationship with their customers by being direct with them. The owner should try to maintain an informal relationship with his daily customers so as not to lose their customers. Even this can help the owner or manager of Cyberia Market to understand their customers, they can predict if there will be any change in their customer's taste or fashion and can fulfill these needs or wants on time in order to maximize their profits..