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.

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


[Q]: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
[A]: 28991


[Q]: ['599', 's', 'h', 'S', '1689', 'f', 'H', 'O', '4779', 'n', 'F', '9131', 'W', 'T']
[A]:
16198