Possum is correct.
FogTech can last as long as 15 days, but 3 to 5 is about average. You should get 40 or more uses out of the bottle, so the cost is about 25 cents or so per application.
Humidity, heavy sweating, etc. will affect how long it lasts. So the harder you work, the more humid it is, etc. will shorten the life closer to the 3 days or even less. Also the type of lenses can affect the life of FogTech.
Shipping varies on where you buy it. We charge $2 for standard mail that will go anywhere in the US in about 3 to 5 days max. Outside the US is $4. And that is for any quantity.