Sentence 1: Ben's agreed to the online and term conditions online. 
 Sentence 3: When the delivery man came, he gave Ben a box 
 Sentence 4:  Ben was mad since his shoes came in the wrong size 
 Sentence 5:  Unfortunately, a representative told him that there's no refund policy 
 Option 1: He purchased a pair of pants. 
 Option 2: He purchased a pair of shoes.