Mary robertson sells tires at a large car service center. she earns 10% commission on the first $1,000, 15% on the next $2,000, and 20% on sales of more than $3,000. last week she sold $3,400 worth of tires. what was her total commission?

In myanmar, six laborers, each making the equivalent of $ 2.50 per day, can produce 40 units per day. in china, ten laborers, each making the equivalent of $ 2.25 per day, can produce 48 units. in billings comma montana, two laborers, each making $ 60.00 per day, can make 102 units. based on labor cost per unit only, the most economical location to produce the item is china , with a labor cost per unit of $ . 05. (enter your response rounded to two decimal places.)