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.

Q: ['9905', 'm', 'Q', 'S', 'T', '7821', '1773', '9515', '3963', '2931', '7023', '8677', '1739', 'O', '909', '9153', '8319', 'k', '2851']

A: 74579
****
Q: ['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']

A: 30507
****
Q: ['783', '1293', 'C', 'g', 'J', '5347', '6785', 'N', 'L', 'y', '7847', 'J', 'X', 'm', 'Z', '9535', '4671', 'K', '9517']

A:
45778
****