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:
['c', '4501', 'O']
answer:
4501


question:
['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']
answer:
31987


question:
['2361', '365', '9561', 'p', 'w', '7087', '5847', '2841', 'y', 'w', 'A', '109', 'G', 'Z', 'l', '9577']
answer:

37748