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', '9979', '8723', '1131', 'i', 'p', 'M']
[EX A]: 19833

[EX Q]: ['8821', '7221']
[EX A]: 16042

[EX Q]: ['3253', '2317', 'c', 'A', 'm', '7729', 'V', 'G', '3917']
[EX A]:
17216