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: ['2915', '4443', 'Z', '3409', '1417', 'H', 'T', 'u', '3373', 'U', '115', 'R']

Output: 15672


Input: Consider Input: ['i', 'o', '1321', 'I', 'W', 'e', '1201', 'I', 'e', 'F', '9841', 'm', '9827', 'q', 'f', 'X', '8261']

Output: 30451


Input: Consider Input: ['x', '3587', '8017', 'G', 'b', 't', '7791', '533', '4599', '9581', 'Y', 'K', '3263']


Output: 37371