Labor Cost

In Cambodia, seven laborers, each making the equivalent of 3.50 per day, can produce 42 units per day.

In China, nine laborers, each making the equivalent of 2.00 per day, can produce 48 units.

In Billings, Montana, two laborers, each making 63.00 per day, can make 100 units.

Based on labor cost per unit only, the most economical location to produce the item is _____, whith a lobor cost per unit of $ ___.