I wonder where I might find out the materials cost of one filled sandbag?

This is the Hezbollah valuation of one Lebanese life. The Hezbollah strategy is one that consists entirely of crimes against humanity.

They will, uh, avoid acknowledging that point.

Let's see: Google tells me poly sandbags can be gotten as cheaply as $.03/bag (std size 14 x 26 inches) for poly and $.07/bag for burlap.