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', 'b', 'h', 'p', '1637']
[A]: 1637


[Q]: ['7187', '5651', 'd', '4869', 'q', '2375', '3547']
[A]: 23629


[Q]: ['5977', '7717', '2151', 'b', 'B']
[A]:
15845