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]: ['X', '6189', '5435', 'y', '8931', '8987', 'F', '8377', 'k', '8631', '8717', 'q', '2923', 'g', '7225', 'j']
[EX A]: 65415

[EX Q]: ['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']
[EX A]: 27212

[EX Q]: ['5297', 'T', 'F', 'x', 'z', '7041', 'o', '3179', 'T', '6523', 'Z', '331', 'r', 'z', '1443']
[EX A]:
23814