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', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']
[A]: 27212


[Q]: ['K', 'O', 'p', '1669', '8647', '3417', 'a', '8903', 'V', 'E', 'l', 'a', '5177', 'J', '6559', '5377', 'X', '9427']
[A]: 49176


[Q]: ['5605', '8067', '7153', '9443', '9215', '6967']
[A]:
46450