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]: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']
[A]: 17432


[Q]: ['o', '8089', '2159', '943', '1255', 'w', 'Y', '3723', 'n', '7767', '2209', 'F', 'c', 'J', '5259', '4427', 'n', 'U']
[A]: 35831


[Q]: ['2185', '4961', '9279', 't', 'V', 'z', '3071', 'i', '6497', 'b', '5579', 'Z', '5087', 'a', 'G', 'r', 'h', '1313']
[A]:
37972