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: ['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

A: 36146
****
Q: ['q', 'I', 'E', 'M', 'T', 'i', '8719', 'r', 'V', '9759', 'I', '1793', 'Q', 'P', '5263', 'I', 'O', '8603', 'y']

A: 34137
****
Q: ['A', '4635', '7641', '5423', '7575', '8559', '3271', '2385', 'R', 'W', '199', 'd', '7939', 'R', '5893']

A:
53520
****