Sentence 1: Jack wanted to purchase a necklace for Amy's Christmas gift. 
 Sentence 3: The one he wanted was too expensive 
 Sentence 4:  He went home and searched online 
 Sentence 5:  He was very happy to find one similar for $80 less than in store 
 Option 1: He went to the jewelry store but they were out of necklaces. 
 Option 2: He went to the jewelry store to look at necklaces.