Larry's Auto Body Repair Shop had revenues that averaged $70,000 per week in April and $60,000 per week in May. During both months, the shop employed six full-time (40 hours/week) workers. In April the firm also had four part-time workers working 25 hours per week but in May there were only 2 part-time workers and they only worked 10 hours per week. What is the percentage change in labor productivity from April to May for Larry's Auto Body Repair?

	a.	+8.97
	b.	+19.23
	c.	-1.76
	d.	+12.09
	e.	-15.84