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]: ['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']
[EX A]: 27419

[EX Q]: ['1671', 'H', '9271']
[EX A]: 10942

[EX Q]: ['e', '3065', 'j', 'J', 'R', 'M', 'z']
[EX A]:
3065