It can be hard to divorce all three techniques from each other, given that the difference in each technique is minor. All techniques adopted and effectively practiced within firms are important strategies that are used for increasing revenues among current customers. An add on sale can simply be defined as a sale of additional goods or services to a buyer. In practice an add-on sale can be seen in a retail scenario; a customer could be buying a suit for a new job after the sizes and colors are to the customers' satisfaction the seller would assume that they would also need shoes, socks, a waistcoat, and a belt to go with. This is a sales technique whereby the seller is trying to encourage or persuade the customer to buy something extra, that may or may not be more expensive, but will still bring up the total amount of the sale. An add on sale is much simpler than a cross-sell or an upsell, because the new item that the seller is exposing the buyer to may cost less than the product they are purchasing; however, the downfall of this technique is that saying “no” to the product being presented is more frequent. Usually two for one deals or “buy one pair and get the second pair half price” deals are the most common ways to transition your sale to that of an add on. From a customer's point of view, adding on can be seen as the seller trying to make the buyer spend more money to bring up the point of the sale. This is why adding on can be difficult, familiarity and relevance of suggestions is important, the seller wants to make sure that the items being shown still match the customers’ initial thoughts and ideas. If they do not there is a high chance of losing the sale. As told in the Journal of Relationship marketing by Kamatura Wagner cross-selling is valuable selling technique used by salespeople to increase the sale by transforming single product buyers to multi-product buyers. Cross-selling is a technique by which the seller will attempt to increase the value of a sale by suggesting an accompanying product. Suggesting related products or services to a customer who is considering buying something. Cross-selling is mostly seen in restaurants or fast food joints, the terms “would you like fries with that?” or “would you like