Give stream of consciousness and then the final answer. Sam's grade was 60th percentile of the 100 grades for his class. Of the 120 grades from another class, 48 were higher than Sam's, and the rest were lower. If no other grade was the same as Sam's grade, then Sam's grade was what percentile of the grades of the two classes of two classes combined?
Options:
(A) 51st
(B) 60th
(C) 67th
(D) 72nd
(E) 92nd

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
51st/60th/67th/72nd/92nd
The final answer: (B).