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]: ['P', '6161', 'k', '5925', 'h', 'G', 'n']
[A]: 12086


[Q]: ['4463', '489']
[A]: 4952


[Q]: ['7305', '7489', 'g', '9259', 'Y', 'P', '1313', 'z', 'd', 't', '115', 'Y']
[A]:
25481