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]: ['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']
[A]: 21169


[Q]: ['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']
[A]: 50667


[Q]: ['8429', 'D', '9917', '4689', 'w', '7529', '8979', 'A', 'S', '8169', 'C', '9067', 'c', '5423', 't', 'g', 'W', '6135', '3645', 'M']
[A]:
71982