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]: ['q', '5151', 'R', '441']
[A]: 5592


[Q]: ['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']
[A]: 22867


[Q]: ['2401', 'Y', 'K', 'A', 'i', 'X', 'o', 'L']
[A]:
2401