@animalchubs,
The price of OrangeCow is fine, we won't change it. Because, because the PED is 1.2 for every 1% change in price there will be a 1.2% change in QD. So, if we increase our price by 1% we will lose 1.2% in units sold. This will lead to a reduction of Total Revenue, not an increase. Therefore, the price won't be changed.
A numerical example, using PED = 1.2. If OrangeBull is $10 and we sell 100 units, if we raise the price to 11 (10% increase) then we'll lose 12 units (12% decrease). so which is better?
$10*100 or 11*88??