Q. A retail store had sales of $65,000 in April and $78,000 in May. Store employs eight fulltime workers who work a 40 - hour week. In April store also had 6 part-time workers at 10 hours per week and in May store had nine part-timers at 15 hours per week (assume 4 weeks in each month).

Required:

Using sales dollars as measure of output, illustrate what is percentage change in productivity from April to May?