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]: ['6019', '1467', '3415', '7785']
[A]: 18686


[Q]: ['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']
[A]: 24879


[Q]: ['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']
[A]:
23066