...as well as "normal" expenses, such as your base pay, BAH, BAS, ACIP, health care, TAD, and PCS moves, to name a few.
If you really wanted to get into the weeds you could also factor in the support structure - the cost of manning the training wings/squadrons with instructors (including THEIR various expenses), other personnel (civilian-types, maintainers, etc.), the cost of the training supplies (paper, pubs, FLIPs, charts, computers, etc.), flight equipment, and the enormous costs of maintaing and operating the Naval Air Stations / outlying fields that host the training wings - the majority of which exist for the sole purpose of training those in Naval Aviation.