Yellow Press, Inc., buys paper in $1,500-$pound rolls for printing. Annual demand is $2,250$ rolls. The cost per roll is $$625,$ and the annual holding cost is $28$ percent of the cost. Each order costs $$75.$

a$.$ How many rolls should Yellow Press order at a time?

Yellow Press should order rolls at a time. $($Enter your response rounded to the nearest whole number.$)$

b$.$ What is the time between orders? $($Assume $192$ workdays per year.$)$

The time between orders is days. $($Enter your response rounded to one decimal place.$)$