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, 2, ['4319', '3495']

SOLUTION: 7814

PROBLEM: 11, 15, ['F', '5371', '3647', 'x', '4073', 'P', 'f', '6463', '6285', 'W', 'B', 'D', 'g', '1903', 'X', '5945', 'Q', 'Y', 'v', 'B', '7237', 'j', 'A', 'E', '873']

SOLUTION:
1903