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: 1, 3, ['e', '1703', 'x', 'U', '873']

SOLUTION: 1703

PROBLEM: 3, 5, ['6233', '8233', 'F', '5', 'c', 'q', 'd', 'M', 'E', 'J', '5045', '5749', 'd', '7135', '689', '8769', '669']

SOLUTION:
5