How is cocaine influenced by internal and external factors?

Complicated to explain but simple if you know what I mean. It is influenced internally by demand on the streets and externally from how much is being imported etc. If there is a huge drug bust with cocaine being smuggled in, there will be a huge external and internal price rise because the confiscated profits need to be made back up somehow, and that effects the internal prices because a gram is £40, if the supplier (external) said £50 for a gram because of the bust, the dealer (internal) would have to sell at at least £50 to get a profit. Hope this helps.