From SCP: Secret Laboratory Public Beta Official Wiki
Janitor Keycard (50%) 
Scientist Keycard (50%) 
Flashbang Grenade (x4)
High-Explosive Grenade (50%) (x2)
5.56x45mm (x3:2)
Janitor Keycard (50%) Scientist Keycard (50%) Flashbang Grenade (x4) High-Explosive Grenade (50%) (x2)