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]: ['s', '407', '7983', '1523', '8983', '9841', 'p', 'y', 'N', '7633', 'T', '4177', 'Z', 'Y', '3223', '7125', '2601', '7467', '3039']
[A]: 64002


[Q]: ['w', '2281', '8651', '2203', 'q', 'n', '4253']
[A]: 17388


[Q]: ['E', 'T', 'C', '2753', '1409', '6999']
[A]:
11161