Backer 60 vs retail 40 pricing breakdown

Here's a breakdown of what is included in backer 60 (the "worst" of tiers from my estimation) vs retail 40.

edit: To elaborate on the "worst" comment above - I gave the team several suggestions about the 60 pricing because I didn't think the value was ideal, but it's around "fine" to me given the circumstances and how things were set up beforehand beyond the publisher's control. Below is how I break it down.

Physical 60:
Game + stretch goals ($40)
Backer content ($10)
Curse of the Moon ($10)
KS slipcase (can't ascribe value, but we'll lowball this with $5)
Both exclusive demos ($? this may be worth nothing to you or a lot, we'll say $1)
Participation in backer voting and other contributions for game design/direction, and helping the game to exist and reach all of its goals ($? see above, $1)
So we'll say that's 67. It'd be worth much more than that to me, but maybe not others.

Digital 60:
Same as above, except no slipcase, but + the following:
OST (I would say between $10-15)
Retro strategy booklet ($2? sure, low estimates here)
Depending on how much you care about physical items, this is great, putting its value disregarding those physical items at about $67-72 at the very least, assuming you care almost nothing about getting the demos and helping/contributing to the game's existence and design/reaching its goals.
edit: PS4 backers also get the dynamic theme. Currently 100% confirmed for digital, and they're working on this for physical as well

Regarding the (some) retailers' FuturePak (steelbook), I think that's roughly equivalent to the KS exclusive slipcase. The steel thingy may end up being a nicer item itself, who knows, but it's not as limited since the window for the KS case is long passed.

Someone pointed out to me "but inflation!", and accounting for an estimated 7.8% 2015-19 inflation, that's less than $5 so eh haha

edit: Added the part about the PS4 theme