8A 2. Can someone show me how to do this problem?

Will rate a thumb up for good response thanks so much (PLEASE CIRCLE OR HIGHLIGHT final answer thx)

In Myanmar, seven laborers, each making the equivalent of $3.00 per day, can produce 42 units per day. In China, nine laborers, each making the equivalent of $2.25 per day, can produce 51 units. In Billings, Montana, four laborers, each making $60.00 per day, can make 100 units. Based on labor cost per unit only, the most economical location to produce the item is with a labor cost per unit of $ . (Enter your response rounded to two decimal places.) Myanmar China Billings, Montana