In Cambodia?, seven ?laborers, each making the equivalent of $ 3.50 per? day, can produce 42 units per day. In China?, ten ?laborers, each making the equivalent of $ 2.25 per? day, can produce 51 units. In Billings comma Montana?, four ?laborers, each making $ 63.00 per? day, can make 102 units. Shipping cost from Cambodia to? Denver, Colorado, the final? destination, is $ 1.75 per unit. Shipping cost from China to Denver is $ 1.20 per? unit, while the shipping cost from Billings comma Montana to Denver is $ 0.20 per unit.
Based on total costs? (labor and? transportation) per? unit, the most economical location to produce the item is _______ (Billings Montana, China, or Cambodia) with a total cost? (labor and? transportation) per unit of ?$______ nothing. ?(Enter your response rounded to two decimal? places.)