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]: ['s', '425', '6135']
[A]: 6560


[Q]: ['4201', '6445', '4009', 'q']
[A]: 14655


[Q]: ['k', 'o', 'X', '1513', 'T', '429', '8173', 'F', '8311', 'd', 'o', '7563', 'X', 'g', 'a', '8669', 'M', 'B', '5697', 'i']
[A]:
40355