Sentence 1: Selena went grocery shopping. 
 Sentence 3: She went back inside and stood in line 
 Sentence 4:  When it was her turn, she explained the mistake 
 Sentence 5:  She paid the difference and felt good about herself for not stealing 
 Option 1: When she left the store, she realized she hadn't paid for the garlic. 
 Option 2: When she left the store, she realized she hadn't paid for the garlic but decided not to go back.