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]: ['8683', 'p', '47', '8983', 'g', 'u']
[A]: 17713


[Q]: ['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']
[A]: 24201


[Q]: ['Q', 'F', 'n']
[A]:
0