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: ['M', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']

A: 44216
****
Q: ['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']

A: 56288
****
Q: ['I', 'T', '2971', '4797', 'v', '9127', 'b', 'r', '3093', '4485', 'N', '8413', '7603', '7761', '9155']

A:
57405
****