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', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
[EX A]: 15293

[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]: ['4875', '8769', 'q', 'e', 'P', '6075', 'l', 'E', '8351', '5353', '8187', '4409', '5509']
[EX A]:
51528