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]: ['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']
[A]: 14533


[Q]: ['x', '1887', 'E', '3995', '5677', '2749', '9951']
[A]: 24259


[Q]: ['s', '7919', 'D', '8459', '6395', '6629', 'k', 'Q']
[A]:
29402