Copper and bronze were worked and re-exported, along with high quality foodstuffs such as olive oil, honey and wine.
High quality foodstuffs like honey, oil, and wine had to be imported. 
mnli hypothesis: High quality foodstuffs like honey, oil, and wine had to be imported.  premise: Copper and bronze were worked and re-exported, along with high quality foodstuffs such as olive oil, honey and wine.