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]: ['j', 'R', '2435']
[EX A]: 2435

[EX Q]: ['8207', '4791', '3925', 'b', 'Z', '8471', '9215', '3117', 'p', '9095', 'h', 'k', 'E', 'h', '6047']
[EX A]: 52868

[EX Q]: ['9087', 'F', 'j', 'O']
[EX A]:
9087