? Grocer Jenny. Set a new price for selected product and either increase or decrease the price of the good by up to 25% to see how the sales for the good change over the next week and click Next Set a new price: $ Submit Calculating Price Elasticity of Demand Item: Cola A brand of cola soda pop. Perhaps Koala Cola. Price $2.00 Quantity 160 Old New S240 70.4 Price Elasticity of Demand = 2.8 Percentage Change 2000% 56.00%