Or how to interact with other humans? Because if he understood that he would find someone to do the computer stuff for him. Of course, he spoke to the reporter just fine, so we know it isn't people skills that is the problem. Clearly its that $40 more puts the price of the tickets over what he has the budget for. Simple as that.

I know you are Mr. Moneybags over here and don't understand how normal people have limits on how much they can spend, but that's the reality for most. Especially those at the age of 81 who cannot reasonably mortgage their future.