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: ['7215', 'd', 'q', 'k', '9301', 'P', 'x', 'C', 'g', 'e', 'o', '2769', '6993', '9769', 'v', '9007', '4131', '8627', 'q']

A: 57812
****
Q: ['A', '4635', '7641', '5423', '7575', '8559', '3271', '2385', 'R', 'W', '199', 'd', '7939', 'R', '5893']

A:
53520
****