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]: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
[EX A]: 33713

[EX Q]: ['2455', 'y', 'k', 'g', '6891', '1725', 'e', 'u', '3559', '2757', '8791', '6261']
[EX A]:
32439