I don't have the book so I can't give a line of evidence but Atticus was all about teaching Jem and Scout those little life lessons without them even noticing so this instance was one of those little lessons he gives them. Hope this helps :)
Singular, Common, Abstract (Hope its right sorry if it isnt
She spends her money on fine clothing, as she attends a lot of social events. She sees those events as opportunities for future provisioning.
She likes to travel, quite comfortably and she has been to many pilgrimages and instead of doing them on foot, she does them on a horse, because she can afford them.