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.

[EX Q]: ['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']
[EX A]: 8317

[EX Q]: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']
[EX A]: 19595

[EX Q]: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']
[EX A]:
21197