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: ['1057', '3937']

A: 4994
****
Q: ['8755', 'A', '2893', '6703']

A: 18351
****
Q: ['6423', '3795', '7187', '8941', 'm', '2097', '9425', '9733', '2961', 'D', 'x', 'P', '7803', '6717', '131', '9561']

A:
74774
****