“…Usually, if the selling price increases, then demand decreases, and viceversa. A hypothesis frequently used in the literature is that demand depends linearly on the selling price of the article (see, e.g., Roy, 2008;Sundar et al, 2012;Rao et al, 2014;Chaudhary and Sharma, 2015;Alfares and Ghaithan, 2016;and Panda et al, 2017). Chen et al (2006) extended this type of demand function and assumed a power function of the price in the inventory system with periodic review and finite planning horizon.…”