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.

Example Input: ['g', 'M', 'I', 'V', '3377', '7309', '3617', 'v', '9207', 'k', '387', 'g', 'C', '4785', '1527', 'O', 'A']
Example Output: 30209

Example Input: ['6011', 'G', '9043', '8009', 'e', '9493', 'G', '7969', 'M', 'n', 'p', 'g', '7925', 'H', '3213', '8095', '97', 'F']
Example Output: 59855

Example Input: ['k', '4231', 'W', 'P', 'r', 'H', 'X', 't', 'L', 'C', 'J', 'E', 'H', 'H', '6429', 'r', '7241', 'q', '8413']
Example Output:
26314