How is the effect of heavy advertising on the prices of goods and services?


Advertising
I see companies like Geico, Ditech, Allstate, etc. advertising heavily and spending millions of dollars (Geico spent 600 million in a single year). How do they afford to offer competetive pricing for their services?

Where can I find the annual advertising budget spent for Nike?

Advertising
I need to find a site that shows the annual budget spent for advertising for Nike, or Adidas, or Reebok for any year.

How can I collect average advertising expenses in a specific industry?

Advertising
According to my research, I need to find the average advertising expenses within an industry to calculate advertising intensity. I know R&D expenses are available on National Science Foundation website. But I still can’t find advertising expenses, does anyone know where can I get these data?