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.

[EX Q]: ['A', '9979', '8723', '1131', 'i', 'p', 'M']
[EX A]: 19833

[EX Q]: ['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']
[EX A]: 56288

[EX Q]: ['6549', 'v', '8485', 'r', 'X', '3563', 'W', 'M', '7645', 'q', '5371', 'w', '9065', '9211', 'y', 'F']
[EX A]:
49889