[
  "Coffee: 65% used, so 35% of 20 kg = 7 kg remain. Tea: 60% of 15 kg = 9 kg remain.",
  "Cocoa: 80% used, so 20% of 25 kg = 5 kg remain. Total remaining = 7 + 9 + 5 = 21 kg.",
  "Total supplies = 60 kg. Percentage remaining = 21/60 * 100% = 35%."
]