|A) If the data in statement I alone are sufficient to answer the question||B) If the data in statement II alone are sufficient answer the question|
|C) If the data either in I or II alone are sufficient to answer the question;||D) If the data in both the statements together are needed.|
From II. we can conclude that 500 boxes were sold on Sunday
From I. we find that number of boxes sold on Monday 500 +10% of 500 = 550.