Sentence 1: My friend Lizzy wanted some gum. 
 Sentence 3: I went to a corner store to purchase it 
 Sentence 4:  I purchased some gum but the total was 25 cents extra 
 Sentence 5:  I gave Lizzy her gum, but I didn't tell her I paid extra 
 Given Sentence 2: She gave me a dollar to go get her some.