How long was Sanji on the rock?

Sanji was stranded on the rock for eighty-five days. Chapter 58 shows Sanji alone after the shipwreck with limited supplies and beginning to ration food on the first day ch. 58, p. 1. Heavy rain falls on the fifth day and a ship passes without noticing him ch. 58, p. 5. Twenty-five days have passed since Sanji was stranded when he eats his final moldy bread ch. 58, p. 7. Time passes from day 30 to day 70 with young Sanji alone on the rocky outcrop during storms ch. 58, p. 9. Rescue ship arrives on the 85th day after Zeff gave up his leg's food to Sanji ch. 58, p. 17. "Rescue ship arrives on the 85th day." ch. 58, p. 17 "Time passes from day 30 to day 70 on the rocky outcrop." ch. 58, p. 9 "Twenty-five days have passed since Sanji was stranded." ch. 58, p. 7