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: ['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']

A: 36629
****
Q: ['o', 'a', 'K', '6031']

A: 6031
****
Q: ['c', 'E', 'M', '1303', 'y', 'H']

A:
1303
****