Apple Company has releases its new i-phone in the market with a suggested retail price of Php 35, 500. Many consumers are waiting for this model because of its unique and more advanced features. You are working as a marketing manager of the i-store, one of its dealer stores. As the marketing manager, it is your responsibility to maximize the sales and profit for four months, making sound recommendations regarding the pricing of the product. It has been observed in the 3rd week of the first month that for every Php 300 increase in the suggested retail price, 3 fewer customers will not buy the product. The proposal must be accurate in computations, and represented using a model.