Sentence 1: Amy was at the store checking out. 
 Sentence 3: She looked in other parts of her purse 
 Sentence 4:  She realized there was a line forming 
 Sentence 5:  Amy couldn't find the cash so she paid with her card 
 Option 1: She looked in her wallet but couldn't find her money. 
 Option 2: She looked in her wallet and saw a big wad of cash.