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]: ['1845', '273', '6921', 'u', '165', 'n', 'y', 'I', 'u', 'X', '5503', 'L', 'G', 'V', '6223', '1123', 'v']
[A]: 22053


[Q]: ['2765', '6767', '7645']
[A]: 17177


[Q]: ['2943', 'Q', 'X', '9095', '3989', '4087', '6893', '683', 'Z', '7897', 'L', '571', '1401', '9067', '2053', '9443', '4471']
[A]:
62593