Call a terrazzo floor installer.
As of 2014 there are only a few retail locations where one can buy a terrazzo repair kit. These kits can be purchased at Home Depot, Lowe's, and local hardware stores.
I need to do some background checks. How can I find public records for free?
You can purchase cheap public liability insurance from companies such as Direct Line and Simply Business. You can find out more about these companies and their liability insurance policies at their respective websites.
Balance sheet and Profit and Loss statements of Public listed companies are available to general public for review. You can also request for full information, or buy it from the related government departments. Sales figures can be found in the Profit and Loss statement of a public company.
One can find a public company list easily by visiting many different resources. One of these resources is a website called SEC, which is a government website. It has a list of all the public companies.
Someone can find information on public speaking classes available in Toronto, Ontario from a number of companies such as Toastmasters and Speechscience.
newspaper financial pages, internet trading companies
Contact that company. If the company is of public domain (such as Wal-Mart) then they are required to provide financial information to the public. A private retained company does not have the obligation to provide such information to the public.
Roles and responsibilities of audit committees are disclosed in the annual proxy statements of publicly owned companies.
The closest data you will probably find will be within the archives of Marketing Sherpa or Ad Age. I've found Ad Age is great for the top individual companies ad spend. eMarketer has some good aggregate reports for the entire industry. Some of those are behind a premium login, though, but some are open to the public.
You convert everything to compatible units (volume should be in cubic meters or in liters), find the density of aggregate, and multiply the volume by the density to get the mass.