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]: ['433', 'y', '2015', '5997', 'X', 'u', '9321', '8037', 'N', 'Z', 'E', '4645', '627', '6595', '7679']
[A]: 45349


[Q]: ['Z', '6245', 'N', '1403', 'b']
[A]: 7648


[Q]: ['V', 'o', 'W', 'V', 'o', '4183', '5595', '4661', 'N', 'g', '4541', '2769', 'z', 's', 'e']
[A]:
21749