Calcium's name derives from the Latin work "calx", meaning Lime. Calcium is present in Lime (building material) and in Limestone

Sale 1 LOW

[No OP Trade] Sold with 2 keys + 3.7 keys of sweets for Spec KS Aussie Sticky

Presuming Engi Cap was offered

X + 5.7 = 16

X = 10

Sticky http://backpack.tf/item/3601466599

Cap http://backpack.tf/item/1663655602

Trade http://backpack.tf/profiles/76561198099793254?time=1443942000&compare=1444460400

Mini for Sticky

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Australium%20Stickybomb%20Launcher Sold for 40.96 on Oct 8th

40.96 + 40.96/1.15 = 76.58

76.58/2 = 38.29

Keys were $2.39 at time of sale

38.29/2.39 = 16 keys

Sale 2

http://www.tf2outpost.com/trade/27225434 Sold for MN Engi Cap + S. PDA + a key

MN had no trade and was offered

Mem Leak had a B/O of 27

X = 15*0.9 + 7.8*0.9 + 1

X = 22

MN http://backpack.tf/item/1812709752

Mem Leak http://backpack.tf/item/1663655602

Trade http://backpack.tf/profiles/76561198063370996?time=1445842800&compare=1445756400

Mini for MN

http://backpack.tf/vote/id/5687b782b98d884b63e94bab 15 keys, using 15