Creating a formula that mirrors the answer into a cell with no formula?

i BELIEVE I WORDED THIS CORRECTLY, I NEED A CELL THAT I WILL HIDE AND PROTECT WITH MY FORMULA IN IT. AND SEND THE ANSWER TO AN EMPTY CELL IS THIS POSSIBLE ? I AM MAKING A SPREADSHEET FOR MY COMPANY WHICH WILL HAVE PEOPLE EDITING AND IMPUTING EVERY SINGLE DAY I CANT LET THEM HAVE ACCESS TO THE FORMULA AS THEY MAY DELETE IT. IS THERE A WAY AROUND LETTING PEOPLE EDIT AND KEEPING FORMULA SAFE ???

pls send the sample file.