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]: ['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']
[A]: 18176


[Q]: ['1831', 'N', '1943', '8501', '7505', 'D', 'W', '449', 'L', '8839']
[A]:
29068