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', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']
answer:
69093


question:
['7361', '3605', 'V', '2039', '9665', 'X', 'b', '1195', '657', '6509', '7195', '2013', '1847', 'v', '9499', '1761']
answer:
53346


question:
['4421', '8257', '713', '5447', 'n', 'S', '7039', '305', 'o', 'k', '1293']
answer:

27475