COBOL hashing function script help

Hi friends,
I am a new programmer new to COBOL; I was interested in generating a hashing algorithm in COBOL but I do not have the necessary skills set to make use of a checksum assembler correctly, but I understand that this is the quickest method to use for a simple hash table.
What I need is help in terms of guidelines on how I can achieve this step by step, thanks guys.
