I think the point was that the bank's claim that $6,000 was spent cleaning the sidewalk is bogus. Regular chalk is indeed difficult to remove from porous surfaces like brick or concrete, but this type washes off in the…
To obtain a stable link I've seen some publishers use a service called WebCite (http://www.webcitation.org). It archives the referenced page as the author would have seen it at the time of publication.
I think the point was that the bank's claim that $6,000 was spent cleaning the sidewalk is bogus. Regular chalk is indeed difficult to remove from porous surfaces like brick or concrete, but this type washes off in the…
To obtain a stable link I've seen some publishers use a service called WebCite (http://www.webcitation.org). It archives the referenced page as the author would have seen it at the time of publication.