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: ['d', '4553']
Example Output: 4553

Example Input: ['129', '8667', 'E', '2919', 'e', 'Y', 'h', 'm', '501', '5911', 'q', '4955', 'D', '1369', 'W']
Example Output: 24451

Example Input: ['2679', 'd', '1145', 'h', 'i', '4313', '8955', 'F', 'U', 'U', '7341', '979', '3257', 'S', '6413', 'H', '2987', 't', 'I', '6041']
Example Output:
44110