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.

['E', 'v', 'l', 'c', 'g', '3929', 'q', 'j']
3929

['Q', 'v', 't', '223', 'm', 'l', 'c', 'M', 'b', '2227', 'P', 'e', 'n', 'f', 'S', '2205', '3517', '5545']
13717

['4623', '8251', 'N', 'n', 'F', '2311', '8151', 'I', 'd', '9625', '9469', 'd', 'T']

42430