Larry's Auto Body Repair Shop had revenues that averaged $60,000 per week in April and $50,000 per week in May. During both month, the shop had 2 workers wherein each worker worked 40 hours weekly for DH 15 per hour. What is the weekly productivity growth for labor cost from April to May? decreasing by 16.67% increasing 21.3% increasing by 8.95% decreasing by 14.8%