Jay Honeck wrote in news:1192023178.522770.61560
@o80g2000hse.googlegroups.com:
Calculus is your friend. 
Calculus alone won't solve this problem.
I'm thinking electro shock therapy.
*Now* we're talking.
People think we're nuts to be doing this business. Some days I agree
with them!
;-)
Only some days?
Bertie