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.

['N', 'V', 't', 'X', 't', 'M']
0

['o', '8089', '2159', '943', '1255', 'w', 'Y', '3723', 'n', '7767', '2209', 'F', 'c', 'J', '5259', '4427', 'n', 'U']
35831

['m', '7747', 'Y', 'l', 'a', '7721', 'M', '6065', '519', '2285', 'x', 'W', '4209', '3949', '5043', '6895']

44433