The price I got was $300 per ton, so, the 2500 lbs was about $400 with the sales tax. The super sack is roughly 1 cubic yard and should cover 324 square feet at the recommeded 1 inch thickness (7-8 lbs per square foot). I was told by a company rep that they could work the numbers a bit the more you buy.
What I really liked about the product was that I didn't have to drain the pond again to apply it.
The wife took a video that I can e-mail if your interested in seeing how I "shot it" into the pond.
John
