Kagiyama Hina asked me to do this for him :3

So here we go!

Hat is 1/1 http://backpack.tf/item/3387441954

Only one recent sale, pic provided here: http://i.imgur.com/0x3MksY.png

The Wet works is a Morning Glory one and the Ushanka is obviously the DP one.

Wet Works: http://backpack.tf/item/3268937815

Now for the math!

Please note, I've run over the prices on SCM that came closest for the killstreak Fortified Compound.

NOW FOR THE MATH! (It's basically simple equations :^) )

((16 ref + 8.66 ref + 9.5 ref) / 18.83 ref) + 45.5 keys = (($9.54 / 1.15) / $2.48) + X + 4 keys

Converting all to keys:

1.8 + 45.5 = 3.3 + X + 4

47.3 = 7.3 + X

47.3 - 7.3 = X

X = 40 Keys

That oughta do it