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]: ['2787', '6085', '6989']
[A]: 15861


[Q]: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']
[A]: 15717


[Q]: ['7385', 'W', '9191', '4417', 'P', 'N', '6631', 'S', 'G', 'y', 'h', 'D', '1641']
[A]:
29265