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]: ['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']
[A]: 37579


[Q]: ['K', '479', 'u', '3489', 'o', '9589', '7153', '7649', '123', 'a', 'A', '3951', '847', 'N', 'R', '947', '9243', 'G', 'a']
[A]: 43470


[Q]: ['S', 'L', 'f', '567', '2445', 'a', '3049', 'G', 't', '5085', 'i', 'F']
[A]:
11146