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]: ['T', '721', '6555', 'g', 'y', 'U', '3053', 'A', '9663']
[A]: 19992


[Q]: ['8147', '3191']
[A]: 11338


[Q]: ['9343', '7199', '6053', '581', 'V', '7517', '1171']
[A]:
31864