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: ['O', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']

A: 56970
****
Q: ['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']

A: 14354
****
Q: ['6651', '5645', 'l', '175', 'A', '1173', 'e', '6635', '2673', '3545', 'z', 'b', 'U', 'm', '5993']

A:
32490
****