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:
['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']
answer:
56407


question:
['4285', '1489', '9439', '8237', '4661', '3015', '2361', '7631', 't', 'A', '1697', 'H', '3601', '5399', 'J', '9233', '9157', 'H', 'Y', '1449']
answer:

71654