Sentence 1: Nina was sorting through her bills. 
 Sentence 3: It was a water bill that had a much larger amount than she expected 
 Sentence 4:  Due to the high bill, she wouldn't have enough to pay 
 Sentence 5:  Luckily, the company was willing to work with her on the bill 
 Option 1: She paid everything on time. 
 Option 2: She noticed one bill on the top that she had missed.