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', 'o', '1321', 'I', 'W', 'e', '1201', 'I', 'e', 'F', '9841', 'm', '9827', 'q', 'f', 'X', '8261']
Example Output: 30451

Example Input: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']
Example Output: 29604

Example Input: ['A', '9203', '9839', 'r', 'N', '6807', 'H', '719', '4751', 'q', 'i', 'a', '1253', 'B', '1025', 'i', '8773', '4929', '4967', '2245']
Example Output:
54511