Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

There is a logical basis to prove that Oswald could not have been getting change at the time of the shooting. 

The office where Geneva Hine worked was right next to the lunch room. It would have been a literally a hop, skip, and a jump to go from one to the other. So, if he was already there getting change during the shots, he'd have had his Coke in hand within what? 10 seconds? You want to make it 20? OK, we'll say 20.

Marrion Baker didn't reach the lunch room until about 80 seconds after the last shot. Remember, it was replicated, repeatedly, using Baker and others. The very fastest that anybody got there was 1 minute and 14 seconds after the last shot.  So, if we use that one, it was 74 seconds. Surely, if Oswald was getting change during the shooting, he'd have had his Coke within 74 seconds. But, he didn't have it: 

Marrion Baker's testimony:

Mr. BELIN- When you saw him, he then turned around, is that correct, and then walked back toward you?
Mr. BAKER - Yes, sir.
Mr. BELIN - Was he carrying anything in his hands?
Mr. BAKER - He had nothing at that time.

Roy Truly's testimony:

Mr. DULLES. What was he doing?
Mr. TRULY. He was just standing there.
Mr. DULLES. Did he have a coke?
Mr. TRULY. No, sir.
Mr. DULLES. No drink?
Mr. TRULY. No drink at all. Just standing there.

So, the problem for Robert Groden is that he's got too much time to kill. If Oswald was on the brink of getting a COKE during the shots, then surely he would have had one by the time Baker and Truly arrived.

So, how did Groden make that mistake? He probably made it because of the widely held presumption that Oswald did have a Coke when Baker and Truly arrived. But, Oswald didn't- as the above testimonies prove. 

I realize that some people presume Baker and Truly were lying, but there is no reason to suspect that. Baker and Truly did not know each other - not even each other's names. They would never have conspired to lie together. We are talking about perjury here. You'd have to know a person pretty darn well to conspire to lie with them- especially in a case like this. And remember that the tests- going up and going down to a stopwatch- hadn't been done yet.  The need to shave a few seconds off Oswald's timeline didn't surface yet. From their very first statements on 11/22/63, before they had any time to conspire to lie or any reason to conspire to lie, both Baker and Truly said Oswald had no Coke, no Coke, no Coke. 

This renders the whole getting change story, including "No pennies, no pennies," preposterous.