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.

['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']
30859

['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
31945

['5747', '5807', '7945', '6369', '9329', 'k', '5891', 'B', '8587', '5613', '973']

56261