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: ['Q', '6383', 'P', '8455', '3881', '5821', 'e', 'v', '1421', 'Q', '6377', '3157', '6407', 'q']

Output: 41902


Input: Consider Input: ['L', 'w', '2783', '6993', 'd', '9173']

Output: 18949


Input: Consider Input: ['1897', '1001', 'z', 'T', '2449', '8885', '5067', 'd', 'R']


Output: 19299