There are many determinants of demand and they are as follows:Product Cost: There would be a change in the demand of the product by the customer as there would be a change in the price. People decide to buy if the price remains constant.Income of the Consumer: The income of the customer also puts an impact on the demand. If the income of the consumer increases then the demand would increase.Cost of related goods and services: The price of related goods and services also decides the demand. In the case of complementary products, if there would be an increase in the price of them then that would decrease the demand for the products.