Supply a mammoth ribcage

This content was only available during F.F. Gebrandt's Prelapsarian Exhibition! For the history of this holiday see F.F. Gebrandt's Prelapsarian Exhibition (historical)

ID: 255880

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From: The Prelapsarian Museum: Osteological Exhibits

It has to be wheeled in on a trolley.

Unlocked with

Locked with is 10000001 (World Quality, now locked)

Success

Delight

"Beautifully preserved. An impressive specimen – we'll put it with the others."

•  You have contributed to Supplying Exhibits: Osteology. (Increases Supplying Exhibits: Osteology by 235)
•  You've lost 1 x Mammoth Ribcage
•  You've gained (see below) x Curator's Gratitude

The gain is logistic with the sum of base + base + base + base (represented here as $x$) as the input.

$6450+{\frac {400}{1+e^{-8\cdot 10^{-3}(x-500)}}}$