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]: ['Y', '263', '641', '1163', 'p', 'r', 'L', '4425', 'C', '7585']
[EX A]: 14077

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

[EX Q]: ['Y', '675', '2355', '5937', 'H', '1819', 's']
[EX A]:
10786