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]: ['4183', 'r', 'g', 'A', 'X', '3207', '3893', 'L', '8411', '3143', '3999', '7801', '8465', 'U', 'k']
[A]:
43102