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]: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']
[A]: 8317


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


[Q]: ['5359', 'v', '4281', '2481', 'Q', 'q']
[A]:
12121