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]: ['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']
[EX A]: 28458

[EX Q]: ['r', '3139', 'C', 'L', '7335', 'v', '9861', 'F']
[EX A]: 20335

[EX Q]: ['L', '2747', '67', 's', 'p', 'W', '8387', '9129', 'P', '5577', '3323', '9863', '4257', 'e']
[EX A]:
43350