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]: ['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']
[A]: 30009


[Q]: ['2087', '8171', 'c', 'd', 'a', '5621', 'n']
[A]: 15879


[Q]: ['l', '3039', 'd', 'B', 'N', '8013', '8301', 'G', '3357', '193', '7081', 'H', '5377', 'q', '6211', 'l', '4327']
[A]:
45899