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Could you possibly elaborate on the profitability of ice? I'm genuinely curious about the economic viability of this commodity. Could you provide some insights into the various markets where ice is traded and its demand? Also, I'm interested in understanding the production costs associated with ice, and how these costs compare to the potential revenue streams. Furthermore, are there any specific trends or factors that influence the profitability of ice? I'd appreciate it if you could shed some light on this matter.