Asking a tricky question! Rookie posts

One morning, a group of students entered a small snack shop…\Inside the shop were three people: an elderly man waiting for noodles, and a man and a woman running the shop.\These five young men sat together with the elderly man!\The young men ordered nearly fifty yuan worth of snacks and five bowls of noodles.\After a while, the morning market arrived, and the snack shop was crowded with office workers and students.\The elderly man urged several times, and only then were the noodles served!\At this time, the students who were sitting with him left; it was 7:26!\After a while, the shop became a little empty again. The elderly man finished his noodles!\The shop owner asked the elderly man for seventy yuan.\What should the elderly man do?\(1. Call 12315… 2. Call 110… 3. Call 120…)\If you were that elderly man, what would you do?\(In the end, the elderly man made a call. Why do you think he made that call?)