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]: ['1203', '6179', '9835']
[A]: 17217


[Q]: ['d', '5571', '6455', '4287', 'I', 'U', 'M', '8303', '8893']
[A]: 33509


[Q]: ['4807', '2815', 'u', '2529', '8863', 'j', '5375', '4703', '4321', '1099', '3291', 'i', '9103', 'V']
[A]:
46906