Yeah, there's no way in hell I'm maxing either of those. If there's anything else I do it'll be to beat Panthera Cantus on level 1 and purchase an Absolute Shadow Ramen if I haven't.
I guess purchasing one of each food/swag wouldn't be hard either, but it's too boring and rewardless to bother.
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http://img.imgcake.com/SonicStacking/dan2jpguq.jpg