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.

['6161', 'p', '2839', 'c', '5905', '1729', 'j', '5901', '3013', 'e']
25548

['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']
26791

['1737', 'z', 'A', 'i']

1737