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: ['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']
Example Output: 24201

Example Input: ['9069', '8333', 'H', '2049', '8051', 'L', '2749', '8819', '2883', '9317', 'M', '6515']
Example Output: 57785

Example Input: ['603', 'D', '7759', 'T', '257', 's', 'k', 'k', '1693', 'q', '7783']
Example Output:
18095