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]: ['t', 'v', 'B', 'Y']
[EX A]: 0

[EX Q]: ['g', 'M', 'I', 'V', '3377', '7309', '3617', 'v', '9207', 'k', '387', 'g', 'C', '4785', '1527', 'O', 'A']
[EX A]: 30209

[EX Q]: ['2401', '8357', 'w', 'N', 'J', '3373']
[EX A]:
14131