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: 12, 23, ['A', 'i', '4191', 'B', '2297', '3959', '1125', 'c', '739', '7887', 'p', '8173', '5301', '1969', '9737', '7011', '9845', 'r', '2977', 'z', 'Q', 'N', '3847', 's', 'D', '3391', 'T']

SOLUTION: 48860

PROBLEM: 25, 27, ['6411', '2467', 'y', '4973', 'C', '8853', 'H', 'G', 'a', 'N', '3759', '7803', '5403', 'Z', '4047', '6283', 'v', '5437', 'p', 't', 'S', '7605', 's', 'Z', '7537', 'Y', 'U', 'W', '2147', 'K']

SOLUTION: 7537

PROBLEM: 2, 15, ['i', '721', '7869', 'f', '2857', '971', '5705', '2427', 'I', 'J', 'e', 'q', '1953', 'U', 'r', '9639', '3603', '4849', 'v', '5183', 'T', 'Q', '1131']

SOLUTION:
22503