1. Analyzing Statement I:
- Each bag contains 5 grapefruits.
- Each case contains 8 bags.
- Total grapefruits per case = \(5 \times 8 = 40\).
- Sufficient to answer the question.
2. Analyzing Statement II:
- The information about 80% full does not provide any exact number of grapefruits.
- Not sufficient.
Thus, Statement I alone is sufficient.