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', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']
[A]: 17806


[Q]: ['C', 'v', '1353', 'e', 'x', 'A', 'D', '1243', '477', 'z', '3483', '5213', 'k', 'm', 'n']
[A]: 11769


[Q]: ['7253', 'J', '991', '7107', 'H', '5373', '2933', '3977', 'F', '9603', 'K']
[A]:
37237