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]: ['n', 'm', 'Y', 'v']
[A]: 0


[Q]: ['8109', '5635', 'u', 'M', '1009']
[A]: 14753


[Q]: ['U', 'J', 'z', '7193', '7035', 'G', '7091', 'K']
[A]:
21319