I need a site that can help me find the current top bids for a PPC keyword on Adwords.

Any help would be greatly appreciated.

I would like to know if a particular company uses Google Adwords – I am researching their ads. Is there some kind of directory for Google Adwords users?

I have experience with Yahoo! Search Marketing, Google Adwords, MSN AdCenter and many 2nd Tier Engines. I'd like to start consulting but don't know where to begin. What do I charge for my services?

Cost of adwors on google and Yahoo

Henry Crouch’s law office has traditionally ordered ink refills at 60 units a time. The firm estimates
that carrying cost is 40% of the $10 unit cost, and that annual demand is about 240 units per year.
The assumptions of the basic EOQ model are thought to apply. For what value of ordering cost
would its action be optimal?
really? 34.64? but in the solution section it shows ordering cost $30 and EOQ 60 units