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]: ['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']
[A]: 37008


[Q]: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']
[A]: 44075


[Q]: ['9481', 'I', '8113', 'p', '1215', 'B', 'j', '4259', '8667', 'r', 'S', 'E', 'T', 'x', 'd', 'l', '7757', '2887', 'v']
[A]:
42379