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.

[Q]: ['Y', 'X', 'd', 'N', '1877', '2865', 'M', '1249', '9385', 'v', 'o', 'P', 'P', '6029']
[A]: 21405


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


[Q]: ['4659', 'O', 'H', 'b', 'x', 'E', 's', 'W', 'B', 'V', '1343', '9049', 'l']
[A]:
15051