In Call of Duty, players can complete Contracts to get cash for purchasing items from the Buy Station. Most COD items in the Buy Station cost a pretty penny, and gathering loot to earn enough cash can take hours of gameplay, which is frustrating. For example, in the latest DMZ Season 6 update, a killstreak costs between $12,000 and $20,000, while a gas mask costs $2,000 to $5,000.