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]: ['b', 'O', '7023', 'q', '2667', '681', 'C', '5707', '7125', 'q', 'Q', '1375', '8869', '6709']
[EX A]: 40156

[EX Q]: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']
[EX A]: 6860

[EX Q]: ['2751', 'Z', 's', 'G', 'f', '3255', 'B', '3861', 'g', '6709', 's', 'E', '9847', '2235']
[EX A]:
28658