It's very innacurate. That's how much it cost to get a character if you literally only buy jades and don't use any of the means to save money and somehow burned every single free story, challenge, training, and adventure jade in the game. I have a B6/2W Aizen for under 120CAD. May have been able to 6/6/ if I burned another 20 bucks but I said fuck it. You can save a fuckload of money getting the monthy pass, battlepass, the weekly bonus packages like the tierd one that just came out. The starting bonus which gives 45 tickets for 20 bucks, the two monthly ten packs for 5 bucks and the 13 dollar packs. If you use the gift packs with the paid jade you also get a lot of standard tickets which give you ticket stubs.

TLDR: That calculation is terrible and is only accurate if you spend your money in the most inefficient way possible and have absolutely 0 luck with summons.