The domain is the number of bags of cookies, which we know goes up to 150. So the domain is 0 to 150. We can't have c less than zero (less than no bags) and we can't have more than 150, because that's all we've got.
The range is the amount of money from the sale of cookies. So that will be $0 to $450, because each bag costs $3. So the most money is $450 and the range is 0 to 450 dollars. Or you could say the range is $450 being the difference between the highest and lowest value.