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]: ['3723', 'v', 'j', 'e', '2017', 'd', '4211', '2079']
[A]: 12030


[Q]: ['t', '7469', 'Y', 'N', '8137']
[A]: 15606


[Q]: ['o', 'K', '7785', '1871', '4511', 'P', 'c', 'c', '7447', '5135', 'e', 'Z', '3537', '7985', 'A', 'T', 't']
[A]:
38271