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]: ['V', '2633', '3269', 'r', 'Q', '3517', '2571', 'G', '4105', 'm', 'z', 'B', 'A']
[A]: 16095


[Q]: ['543', '8351', 'I', 'M', '6647', '731', 'b', 'r', 'l', '3935', 'k', 'z', 'v', '2131', '7781', 'X', '9419', '5013', 'F']
[A]: 44551


[Q]: ['j', 'D', 'C', '5527']
[A]:
5527