A firm has redesigned its production process so that it now takes 9 hours for a unit to be made. Using the old process, it took 13 hours to make a unit. If the process makes two unit each hour on average and each unit is worth $1,500.

Using the old process, inventory = ? units;

After redesigning the process, inventory = ? units;

The reduction in work-in-process (inventory) value is $ .????