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]: ['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']
[EX A]: 24201

[EX Q]: ['8669', '9115', '2573', '9261']
[EX A]: 29618

[EX Q]: ['i', 'J', 'b', 'Z', 'b', '9389', 'T', 'H', 'l', 'Z', 'd', '1023', 'A', 'n', '6829', 'n', 'G', 'h', '8297']
[EX A]:
25538