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]: ['d', '7305', '8903', 'b', '7687', '6393', '6939']
[A]: 37227

[Q]: ['1391', '1719', '8547', 'x', 'a', 'j', '6395', 't', '3421', '6607', 'M', '1645', 'H', 'x', 't']
[A]: 29725

[Q]: ['r', 'b', 'G', 'H', '255', '6809', '5133', '1059', '4317', 'P', '7219', 'd', '805', 'G', '5243', '8305', '8509', 'o']
[A]:
47654