posted on Jun, 21 2010 @ 04:54 PM
The marketing technique does not make sense regarding something you must purchase anyway.
Maybe for a sofa or a car or a pair of jeans the .99/9/10 is reality based.
The real reason for the 9/10 is because the calibrated gasoline pumps which record the quantity of fuel, it only reads in odd tenths of a gallon.
1/10, 3/10, 5/10, 7/10, and 9/10.
So there you have the answer from the Shell Man.