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.

['7187', '5651', 'd', '4869', 'q', '2375', '3547']
23629

['Z', '6245', 'N', '1403', 'b']
7648

['Z', 'L', 'Y', '739', 'h', 'C', 'u', 'k', 'v', 'V', '7389', '2927', '1643', 's', 'y']

12698