Compute the multifactor productivity measure for an 8 hour day in which the usable output was 405 units, produced by 5 workers who used 760 pounds of materials. Workers have an hourly wage of 21 and material cost is 1.5 per pound. Overhead is 1.3 times labor cost.
The multifactor productivity (units/$) = ______ (round to 4 decimal places)