Others have already posted it in this thread. I might add that it appears to me that LHO typically didn’t have much money anyway. And the fact that he left a large (for him) sum of money that day indicates that he had kept most of what he had on his person.
"He normally kept whatever he had on his person according to Marina."
Charles Collins
Mrs. OSWALD. Yes, in my room at Ruth Paine’s there was a black wallet in a wardrobe.
Whenever Lee would come he would put money in there, but I never counted it.
Mr. RANKIN. On the evening of November 21st, do you know how much was the wallet?
Mrs. OSWALD. No. ...
Mr. RANKIN.
Did he take the money from the wallet from time to time?
Mrs. OSWALD.
No, he generally kept the amount that he needed and
put the rest in the wallet.
I would suggest that Oswald's actions were not out of the ordinary, except he had not visited for two pay periods. It seems he needed about $15. According to John that would cover him until the next Friday should he decide to bail on his attempt.