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]: ['I', '1941', '2423', '3381', 'J', '6589', 'h', 'D']
[EX A]: 14334

[EX Q]: ['y', '2601', 'P', '4759', '87', 'd', 'I', 'D', 'M', 'K', '2921', 'q', 'a', '4551']
[EX A]:
14919