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.

Input: Consider Input: ['3683', 'U', 'x', '313', 'n', '3837', '3299', '2081', '2773', 'r', 'O', '257', '6647', '585', 'o']

Output: 23475


Input: Consider Input: ['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']

Output: 21103


Input: Consider Input: ['9033', '8711', 'c', 'e', 'l', '4995', '7851', 'q', '6689', 'w']


Output: 37279