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: ['1671', 'H', '9271']

A: 10942
****
Q: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']

A: 21197
****
Q: ['y', 'U', '5881', '6033', '4651', '6553', 'j', 'F', 'd', 'P', 'P', '3077', '6867', 'k', 'T', 'j']

A:
33062
****