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', 'P', 'y', '4891', '1539', 'J', '5737']

A: 12167
****
Q: ['I', 'J', 'K', 'D', '5961']

A: 5961
****
Q: ['3161', '35', 'f', 'Y', 'y', '2217', 'y', 'v', '6503']

A:
11916
****