They changed the size!
Check this out:

They have been reduced from 10 ounces to .84 ounces!
Let us look at the nutritional data on the back:

You can see the the carbs, sugars, and protein have gone down by one gram each.
How about size?
Take a look:

The new bar looks longer!
But how about thickness?

It looks about the same thickness, but it doesn't look as dense.
As far as cost, I didn't keep track of the old price, so I couldn't tell you.
I hate change.