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]: ['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
[A]: 31945


[Q]: ['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']
[A]: 36098


[Q]: ['g', 's', 'Z', '8935', '7993', 'Q', 'k']
[A]:
16928