The ABC Company manufactures electrical assemblies. The current process uses 10 workers and workers are paid at a rate of $20 per hour. Suppose the material cost is $300 per hour, and overhead is charged at 150% (or 1.5 times) labor costs. Supposed output per hour is 200 units. What is the multi-factor productivity per hour? 0.35 0.25 0.3 0.2