Source: https://webcache.googleusercontent.com/search?q=cache:mhVolO...
[Google cache, the original PDF is 404 Not Found]
Edit: looks like one can find erythritol for as little as $15, which is still 34 times more than sugar.
That being said: I'm not sure if it's enough to make it cheaper than sugar.
Personally, I'd prefer they just kept the original fat and call it a day as there seems to be absolutely nothing wrong with it health-wise.
Erythritol is actually 70% as sweet as sugar. So you actually need to supplement it with something else to match sugar.
> Doses over 50 grams (1.8 oz) can cause severe diarrhea, plus a significant increase in nausea and stomach rumbling.
I don't know what the weight ratio would be to substitute that for sugar, but a can of soda has ~40g of sugar so I'm guessing you need to be careful with it similar to other sugar alcohols.
... and that's "just" 50 grams.