What are the implications for productivity and costs?

4. At Symtecks, the output of a specific process is valued at $100 per unit. The cost of labor is $50 per hour including benefits. The accounting department provided the follow- ing information about the process for the past four weeks: Week 1 Week 2 Week 3 Week 4 Units Produced 1,124 1,310 1,092 981 Labor ($) 12,735 14,842 10,603 9.526 Materials ($) 21.041 24,523 20,442 18,364 Overhead ($) 8,992 10,480 8,736 7,848 a. Use the multifactor productivity ratio to see whether recent process improvements had any effect and, if so, when the effect was noticeable