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.

['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']
11785

['G', 'Z', '4819', '9763', '9987']
24569

['v', '8953', 'z', 'v', '1741', '5517', 'k', 'v', '2627']

18838