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]: ['9445', '7291', 'r', 'g', '1175', '7823', '5507', 'j', '7249', '6335', '3853', 'b', 'u', 'S', '365', 'Z', '7489', 'S', 'W', 'e']
[A]: 56532


[Q]: ['A', 'y', 'u', 'S']
[A]: 0


[Q]: ['4583', 'k', '5827', '3297', '283', 'q']
[A]:
13990