ATP and derivatives of Coenzyme A (acetyl-CoA is one of many) are short term storage molecules. ATP is the most important energy-rich phosphate compound. Coenzyme A derivatives are important short term storage for anaerobic organisms, particularly those that rely on fermentation.
At In-N-Out, why do animal style fries cost more than double the price of regular fries? As of January 2012, regular fries are $1.50 and animal style fries are $3.40.
Overall, the In-N-Out burger wins for its secret sauce, fresher ingredients, and unbeatable price ($3.60, compared to $6.94 at Whataburger). However, if what you're looking for is solid costumer service and a simple order of fries, you can't beat Whataburger's friendly staff and classic french fry.