SOLUTION STEPS (Set 1 — P4 Whole Numbers):
Question ID: 3226

  1. Let box A be 1 unit. B = 1 unit + 250, C = 1 unit + 190.
  2. Total: 3 units + 440 = 1,085. So 3 units = 645, 1 unit = 215.
  3. Box C = 215 + 190 = 405 g.