Corin sells Sunday newspapers in front of a retirement home on Sunday mornings. Corin charges $2.89 per role and pays $1.23 for a role. The residents of the retirement home think fondly of Corin and are not too upset when the paperwork runs out. On the other hand, all the papers Corin has left are thrown into the recycling bin. Corin is trying to come up with a systematic ordering policy. When Corin runs out of papers, the sale is lost. Calculate the level of service. (two decimal places, 0.00)