Nobody can beat Indians
In Japan in a soap manufacturing company, they were making bathing soaps.
The soap blocks were made, then wrapped in a wrapping paper automatically on
an assembly conveyer belt and finally packed in cartons.*
Many times it happened that the wrapping machine wrapped the paper without
soap. i.e. you had an empty packet without soap. To rectify this problem
the Japanese company bought a x-ray scanner from the US for $60,000/- to
check on the assembly line whether the container contained soap and wasn't
empty.
A similar problem happened at Nirma soaps, Ahmedabad.
Guess what the Gujjus did?
They bought a Crompton fan costing around $60/= and placed it on the mouth
of the assembly line.
--the empty wrappers without soap just blew away!!!