TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 10, 16, ['Q', '931', 'P', '6777', 'X', '3855', 'i', '1055', 'd', 'p', '7947', 'z', 'X', 'h', 'g', 'w', 'r', 'T']

SOLUTION: 7947

PROBLEM: 9, 16, ['u', '81', '19', '5877', 'F', '6479', 'v', '4187', 'M', 'a', '4309', 'z', 'u', '55', 'w', 'W', '7471', 'b', 'k', 'W', '8785', 'y', 'n', 'q', 'G']

SOLUTION: 4364

PROBLEM: 12, 14, ['d', '2523', '2711', '4123', '3627', 'E', 'T', '5039', '689', 'K', 'O', 'v', 'd', '9159', '6907', '4271', '9231', '925']

SOLUTION:
9159