Sailmaster makes high$-$performance sails for competitive windsurfers. The following is information about the inputs and outputs for one model, the Windy $2000.$

Units sold $1,223$

Sale price each $ $1,705$

Total labor hours $46,686$

Wage rate $ $11/$hour

Total materials $ $60,200$

Total energy $ $4,000$

Calculate the productivity in sales revenue$/$labor expense. $($Round your answer to $2$ decimal places.$)$