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]: ['6907', '9123', 'L', '8871', 'q', 'C', 'U', '7403', 'F', '3827', '3951', '8879', '2865', 'x', '6175', 'T', '1147']
[EX A]: 59148

[EX Q]: ['D', 'b', 'h', 'p', '1637']
[EX A]: 1637

[EX Q]: ['7815', '693', '8283', 'E', 'N', '5977', '7527', '6655']
[EX A]:
36950