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.

['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']
14652

['4515', '3911', 'M', 'T', 'w', 'F']
8426

['9747', 'N', 'T', 'F', 'v', 'H', '3715']

13462