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: ['5749', 'l', '3297', '8913', '4625', 'M', 'X', 'g', '3143', 'i', '8369', '6101', 'w', '3683', '3891', '1399', '9105', '6923', 'K']

A: 65198
****
Q: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']

A: 68823
****
Q: ['9101', '3669', '711', '711', 'i', '9995', 'u', 'T', '3711', '7941', 'P', '5883']

A:
41722
****