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', '425', '6135']
[A]: 6560


[Q]: ['N', 'O', '2635', '8891']
[A]: 11526


[Q]: ['6001', '6423', '5591', '8721', 't', 'x', '3723', 'E', 'F', '7353', 'b']
[A]:
37812