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]: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']
[EX A]: 36604

[EX Q]: ['89', '5965', '9463', 'k']
[EX A]: 15517

[EX Q]: ['g', 'M', 'x', '1915', 'I', '6153', '1747', '6903', '7979', 'u', 'z', 'm', '6043', '1085', '8479', '5385', '3033']
[EX A]:
48722