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.

[EX Q]: ['D', 'b', 'h', 'p', '1637']
[EX A]: 1637

[EX Q]: ['d', '4553']
[EX A]: 4553

[EX Q]: ['1919', 'P', 'q', 'y', 'd', 'B', 'd', 'L', '433', 'g', '7811']
[EX A]:
10163