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


[Q]: ['3575', '8877', '3231', 'v', '9083', '317', 'M', '8975', 'x', 'F']
[A]: 34058


[Q]: ['a', '6989', 'K', 'O', '5605', 'l', 'S', '8997', '5755']
[A]:
27346