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.
Macho in Portuguese and Spanish is a strictly masculine term, derived from the Latin mascÅ­lus meaning male (today hombre or varÃ³n, c.f. Portuguese homem and now-obsolete for humans varÃ£o; macho and varÃ£o, in their most common sense, are used for males of non-human animal species).