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]: ['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']
[A]: 55013


[Q]: ['F', 'z', '1159', '345']
[A]: 1504


[Q]: ['5447', 'K', 'R', 'I', '3605', 'D', '3555', 'v', 'e', '5073', '5565', '2571']
[A]:
25816