A hospital's biomedical repair shop uses a 4-week periodic system to maintain the inventory on the blood pressure cuff repair parts. They use an average 50 adult arm cuffs with a standard deviation of 8 cuffs during their reorder leadtime. Cuffs aren't the most critical item they carry, but the manager would like to avoid the embarrassment of a stockout at least 95% of the time. The hospital receives daily deliveries from their supplier to the transportation lead time is essentially 0. What should their restocking level be