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.

['t', '7469', 'Y', 'N', '8137']
15606

['p', '4689']
4689

['5121', '9541', '7615', '3797', 'J', '2663', '149', 'I', 'e', 'J', '5291', '9497', 'F']

43674