3 The evidence against Koumis, derived from telephone intercepts, was that between 3 March 2006 and 11 April 2006, 1,007 telephone calls were identified as being related to his trafficking activities. Based upon those conversations, it was established that between those dates Koumis trafficked 'close to' one kilogram of heroin. The evidence was that he purchased that amount of heroin from his suppliers. There were approximately 32 transactions in which heroin was supplied to Koumis and approximately 57 total sales transactions by Koumis over the period in question. Although the precise amount of heroin trafficked could not be quantified, on any view of the evidence, the amount of heroin trafficked by Koumis well exceeded 500 grams, being the minimum quantity defined as being a 'commercial quantity' by Part III of Schedule 11 of the Drugs Poisons and Controlled Substances Act 1991. The evidence further disclosed that Koumis had trafficked in 'about' half a kilogram of methylamphetamine. The telephone intercepts revealed that there were approximately 32 such transactions during the relevant period, in which the applicant sold methylamphetamine to customers in Melbourne's western suburbs, Geelong, Portland, Hamilton, Ballarat and Mildura. The total amount was significantly in excess of the defined minimum trafficable quantity of methylamphetamine of six grams. The evidence before the sentencing judge was that the applicant's revenue from the sale of heroin during the relevant period was between $150,000 and $200,000 and between $50,000 and $60,000 in relation to the methylamphetamine.