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]: ['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']
[A]: 25193


[Q]: ['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']
[A]: 9898


[Q]: ['O', '2137', '407', '6497', 'Q', 'W', '7175', '1621', '7103', 'R', '8261', '8353', 'Z', 'y', 'q', 'V']
[A]:
41554