Lake Charles Seafood makes $500$ wooden packing boxes for fresh seafood per day, working in two $10-$hour shifts. Due to increased demand, plant managers have decided to operate three $8-$hour shifts per day instead. The plant is now able to produce $700$ boxes per day. production is increased to $750$ boxes per day $($with the three $8-$hour shifts$),$ the new productivity $=$ boxes$/$hour $($round your response to two decimal places$).$