A local firm produces three type of burger, for delivery to homes in the area. The owners have completed a survey and discover that the demand for each of the three type of burger. The schedules are shown below: (Quantitative are pre-week). Calculate the Price Elasticity demand (PED) for burger A, burger B and burger C when the price:

1.Increase from $ 9 to $10

2.Decrease from $8 to $6

To calculate the price elasticity demand. For each of calculation show the steps.