Actually, I really don't have a lot of time to play with this stuff. I've
been in the computer field since September 1964. I don't try anymore to
produce the best answer, just an answer. Perhaps when I retire in 6 years at
age 70, I may play with formulas to the extent that they become obfuscated.
But in the meantime, JMB, continue to contribute. It is very important.