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]: ['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']
[EX A]: 14354

[EX Q]: ['1203', '6179', '9835']
[EX A]: 17217

[EX Q]: ['5461', 'M', 'a', 'd', '7913']
[EX A]:
13374