Marginal Costs. The marginal cost of production is the change in the total cost associated with making just one product or item, and is determined by dividing the change in cost by the change in quantity. Generally, marginal costs start high and decline as production increases.
Muchacho is a Spanish word for boy or young man. An example of muchacho is a teenage boy living in Mexico City.
poncho. A Latin American style of shawl, traditionally woven from wool, but now can be made from any material. It's basically a piece of cloth wrapped around the shoulders and hanging down to your waist, and it has a hole for the head in the middle. It was extremely popular in the 1970s. Supposedly, trendy grade school kids are wearing them now, but I'm in college and I wouldn't know about that. I just bought a black fishnet poncho with sequins, which will form an integral part of my new 1970s punk/porn style.