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:
['3883', 'T', '6175', 'B', '4365', '3719', 'V', 'B', '3173', 'K', 'Z']
answer:
21315


question:
['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']
answer:
61496


question:
['3179', 'J', '7343', '2221', '103', '3975', 'y', 'M', '6409', '1961', 'F', '7689', '8575', '9591', 'b', '4217', 'W', 'N', 'D', 'i']
answer:

55263