A benzyl group is the part of a molecule that is connected to a carbon + 2 hydrogens, which is connected to a Benzene ring

So Benzyl Alcohol is C6H5 - CH2 - OH, the Benzyl group being the C6H5 - CH2 -

Sale 1

http://www.tf2outpost.com/trade/27067025 Sold for KaW Ballcap

B/O for Fukaa was 18

B/O for Ballcap was 30

X = 26.5*0.9

X = 24

X = 18 (B/O)

Ballcap http://backpack.tf/item/2602930034

Fukaa http://backpack.tf/item/3559298336

Sale 2

http://www.tf2outpost.com/trade/27447962 Sold for EStatic Milkman

B/O for Fuka was 20

Milkman had no trade, presuming offered

X = 23*0.9

X = 21

X = 20 (B/O)

Milk http://backpack.tf/item/2179281904

Fukaa http://backpack.tf/item/2178332938

Sale 3

http://www.tf2outpost.com/trade/27394751 Sold for Logo Beanie + 1 key + 0.3 in sweets

B/O for Fukaa was 21

B/O for Beanie was 18

X = 18*0.9 + 2 + 0.3*0.9

X = 18

Beanie http://backpack.tf/item/319299757

Fukaa http://backpack.tf/item/2178332938

Mini for Beanie

http://backpack.tf/vote/id/567201e2ba8d88f25da94bdd 19 keys, using 19