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]: ['o', 'L', 'E', 'V', 'D', 's', 'Z', 'm', 'a', '2785', 'I', 'v', 'B', '7909', '1599', 'V', 'N']
[A]: 12293


[Q]: ['3331', '5791', 'r', 'Q', '2243', '8229']
[A]: 19594


[Q]: ['i', 'f', 'c', '923']
[A]:
923