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]: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
[A]: 33713


[Q]: ['I', 'n', '3069', '477', 'F', 'k', '847', '6777', 'N', 'X', 'F', '1417', '9445', 'o', 'v', 'd', '2169', 'w']
[A]: 24201


[Q]: ['r', '2265', '9063', '4681', '3437', 'o', 'i']
[A]:
19446