If you are thinking about why it says 1000 Ryo instead of 800 or 720 Ryo for karaoke, it is because this is the cost before any Party House discount like the Party House upgrade (-20% Base Cost) and the Fun Club Memberships upgrade (-10%)
I haven't read your post up there but I think I realized why I'm surprised by the numbers. the prices were increased by 25% during recode but it didn't make a difference to people who already had party room access because the replacement version of the upgrade negated this effect. But I was thinking instead of 800 not instead of 720.
Shouldn't the Catgirl Entourage be mentioned on this page?
With regards to the supposed 88k it should cost only with party house upgrade to get Party Animal….shouldn't it be 85k?
19 Karaokes + 1 Research Expedition
800 (2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 10) + 5000
85000?
As the page says, all prices are multiplied after each purchase of two parties.
After purchasing those 19 Karaokes, the Research Expedition would also cost x10: 50,000.
Buying a Karaoke is always cheaper than buying a Research Expedition.
After doing the math myself, I found that with just the Party House upgrade, it would take 2,200,000 Ryo to reach the 1,000,000 Jutsu XP maximum using All-Out Bashes. The page lists that the most would be 2,000,000, but for 20 All-Out Bashes at 50,000 Jutsu XP it costs 20000 + 20000 + 40000 + 40000 + 60000 + 60000 + 80000 + 80000 + 100000 + 100000 + 120000 + 120000 + 140000 + 140000 + 160000 + 160000 + 180000 + 180000 + 200000 + 200000, or 2,200,000 Ryo. Thus, the maximum amount (without Party House) would be 2,750,000 Ryo rather than the 2 million mentioned on the page.