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]: ['773', 'e', '4451', 'S', 'I', 'r', 'e', 'V', 'Q', 'g', 'J', 'L', '7655', 'O']
[EX A]: 12879

[EX Q]: ['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']
[EX A]: 11785

[EX Q]: ['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']
[EX A]:
41788