It was established at trial that Jodie's cousin, John Ferris, was selling cannabis to Luke who in turn shared it with friends including Jodie. Who was supplying John Ferris? How far back does the chain go?
Ferris probably got laid-on a "9 bar" 9 ounces, 250gram of compressed hash.
(Laid-on, means get now pay later, probably with-in a few weeks) The cost of this varies in 2003 probably around £400/500. He would then cut his 9 bar into ounces and disrepute that to the likes of Mitchell for about £80/90 per ounce. Maybe he laid-on this or maybe he asked for the money up front, who knows. But i suspect he would have needed the money quickly to pay his dealer. Mitchell, then would have cut (he had the tools) his ounce's into scores/quarters and sold them on. Scores for £30, quarter for £15. 8 quarters in an ounce = £120, £30/40 profit for him. The more ounces he sells, the more profit, or the more smoke he gets for himself.
The person that supplied Ferris, we don't know. Probably someone local that was dealing in half kilo's, possibly full kilo's. You get around 35/36 ounces in a kilo. His dealer was probably a big shot from Edinburgh. There probably would have been several players in the Edinburgh area dealing with such quantities. The large quantities were probably driven up to Edinburgh by drug mules for Liverpool gangsters.
Now, the question I ask is what relevance does the supplier of Ferris have to do with Luke Mitchell murdering Jodi?