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', 't', 'W', '163', 'v']
[A]: 163


[Q]: ['3215', 'h', '9133', '2771', 'F', 'x', '9033', '709', 'q']
[A]: 24861


[Q]: ['t', '6391', 'R', 'p', 'U', 'N', 'u', '4783', 'l', '3165', '4405']
[A]:
18744