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: ['1709', 'S', 'w', '7725', 'Z', '7755', '8081', '897', 'N', '4449', 'F', 'F', 'M', 'y', 'B', 'h', 's', 'l', 's', '415']

A: 31031
****
Q: ['C', '3133', '2183', '5793', '9305', 'd', 'g', '6501']

A: 26915
****
Q: ['3005', 'k', 'Q', 'V', 'j', '9239', 'f']

A:
12244
****