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: ['6577', 'Q', '6865', '7671', 'N']

Output: 21113


Input: Consider Input: ['1305', '1673', 'w']

Output: 2978


Input: Consider Input: ['8617', 'R', 'q', '9415', '8885', 'q', 'N', '9457', 'v', '759', 'f', 'b', 'f', '247', 'G', 'l', '4731']


Output: 42111