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: ['251', '2155', '5029', 'k', 'j', 'I']

A: 7435
****
Q: ['7335', '813', '6461', '8903', '3709', 'V', 'G', 'I', 'P', 'p', 's', 'v', 'R', '4697', '4263', '9897']

A: 46078
****
Q: ['3251', 'f', 'P', 'f', 'p', 'V', '7401', '4851', '8829']

A:
24332
****