instruction:
In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
question:
['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']
answer:
22867


question:
['K', '5815', 'E', 'c', '7379', '4995', 'w', 'B', 'j', '6227', 'B', '733', '1491', '3191', '9413', '2751', 'O', 'J', '6239', '3521']
answer:
51755


question:
['h', 'R', '4071', 'j', 'r', 'g', 'i', '2473', 'U', '5707', 'c', 'F', '1891', 'p', 'D', 'D']
answer:

14142