Database of Advt, Digital Marketing & Social Media agencies!

We want the first name, last name, email & phone nos. of marketing heads of social media, advertising, PR & digital marketing agencies in north america. If this project is done well, we will continue this project for collecting the same info for other countries. You should have experience doing this work. You might have to spend time on google search, linkedin, spoke & other marketing databases to find this info. please quote per record or what you think it will take to do this. Message me with details of how you will do this, how long & the costs. Answer this: 1+9=?