Which pair best specifies the phrase “standard shipping is free at €50 or more”?

Which pair best specifies the phrase “standard shipping is free at €50 or more”?

1. 4,999 cents costs 500 cents; 5,000 cents costs 0 cents
2. 6,000 cents costs 0 cents; 7,000 cents costs 0 cents
3. A large order is cheap; a small order is expensive
4. The implementation contains a variable named threshold