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.

['3895', 's', 'j', '7755', 'H', '7941', '4903', 's', '3629', '1183', '1001', '5569', 'q', '4735']
40611

['W', '4453', '5895', 'Z', 'A', '7663', '2749', 'f', 'H', '6917', '1215', 'M', '1775', '5397', 'l', '8197', '5209', '8229', 'U']
57699

['u', '3959', '3731', 'F']

7690