This is sodium and chloride in a 1 to 1 ratio. It’s perfectly balanced. You’re getting 1.8696764 x 10^26 sodium atoms and 1.8696764 x 10^26 chloride atoms.
I’m surprised that they can sell it so cheap.
Note: You really only need the chloride atoms. See if they will sell just the chloride atoms for 1/2 price. Actually, the chloride weighs about 24.26 lbs. per bag. So, a fair price for just the chloride would be about $30.32.
For your pool starting with no salt, you would need about $900.00 worth of salt. That's crazy.
A long time ago, salt was worth that much. Maybe the company has been in business for thousands of years and haven't kept up with the new prices.
Well, this is going to be less funny than everyone else's reply, but I know the real reason. Shipping. I am guessing they offer free shipping on orders over a certain amount, and it isn't cheap to ship a 40lb bag over UPS, so they have to factor that in to the price. It's the same reason those catalogues don't sell liquid chlorine. Or they do if you search deep enough but it is something like $5/gal and the minimum is 100 gallons.
I figured that was the reason. I tell you what I've seen recently when shopping online that really annoys me; they'll have a crazy low price listed for the item you're looking for, then when you get to the product its on a drop down menu with a bunch of other products and each one has a (+$x.xx) next to it. Bunch of bait and switch, click baiting scammers. I won't buy anything from a business that uses scam tactics like that. Let em all burn.