Kill both targets in the elevators, grab the 8th floor key from the scientist, go to the 8th floor with your rifle case, pull fire alarm, run to the scientist's room, use the cellphone in the bedroom to redial the Sheik, wait on the balcony until he comes out of the exit on the ground floor, snipe him, repack the rifle, go to your 7th floor room and store your rifle, grab money suitcase, exit.