What a misfortune

There is a chasm in mountains with a log thrown across. A local carries tourists on his hands to the other side balancing on the log. Three tourist approach.

“Can you carry us to the other side?” one of them asks.
“Well, this will be $3, $1 for each”

The local carries one, another, but suddenly stumbles and drops the third right in the abyss.
He casts an upset look down and says, “What a misfortune, it’s only going to be $2.”