Are the sentences below natural? Thank you.
1. You can use this coupon to get NT$30 off a meal.
2. Using this coupon, you can save NT$30 for a meal.
3. This coupon gives you NT$30 off a meal.
4. This coupon entitles you to NT$30 off a meal.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.