In the Programming stage of the system development life cycle, the design specifications are translated into computer code
Due to the length of the hash I'm going to say it's MD5
Well the result shown in C19 will show the sum of all cells from C5 to C18:
ie: C5 + C6+ C7+ C8+ C9+ C10+ C11+ C12+ C13+ C14+ C15+ C16+ C17+ C18
:)