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: 22, 25, ['681', '2393', 'f', 'g', '5051', '5839', 'T', 'p', '8057', '6929', 'N', '1519', 'G', '8969', '8589', 'T', 't', '4915', 'r', 'M', 'N', '8285', '8607', '4333', '7457', '343', 'f', 'r']

SOLUTION: 28682

PROBLEM: 3, 4, ['I', '8765', 'a', '719', '2555', 'w', '3437', '6159', 'e', '5239']

SOLUTION: 719

PROBLEM: 12, 20, ['A', 'E', '4247', '9879', 's', 'X', '2485', 'e', '2361', '3605', 'Q', 'x', 'v', '1865', '5983', '6321', '7757', 'R', '563', '4591', 'F', 'n', '7817', 'D', '9219', 'G', 'N', '7051']

SOLUTION:
27080