The retro bonus is a bonus given to wholesalers, distributors, and sellers upon completion of the sales plan. Bonus has carried out well in business and is an excellent example of a company that encourages its customers to buy. Marketing courses are designed to encourage distributors to cooperate and purchase products. The retro bonus information is stated in the sale and purchase contract, which includes: price, item classification, cash payment options, via bank transfer, retro bonus percentage, and accumulating period.