Ah, the pink tax. 1300$ a year, appearently. Or, as TL;DR puts it, and indeed lets make that a thing: The ego gap. A womans ego is valued 1300$ more a year as pink tax proponents claim.
(Mind you, thats not actualy saying women end up paying 1300$ more seen how dating men according to the good men project - a feminist organisation - pay 12000$ a year on dates(in the chicago area) - okay, i never did that. Paying a lot more on a relationship than my partner. So, if im reading that, im just thinking that you could get a live in BDSM prostitute for 2-3 months for that money. Or 6 customised high-end sex dolls.)
In case you dont know about TL;DR yet, you should check him out. Specialisation in detailed analysis.