Calories in Tea. Tea comes from the Camellia sinensis plant. Even though you'll see many varieties of tea on store shelves, there are only four major categories of tea: white tea, green tea, oolong tea and black tea. The difference between each type is the degree to which each type of leaf is oxidized or fermented.
Mixed or semi-variable cost: A cost that has the characteristics of both variable and fixed cost is called mixed or semi-variable cost. For example, the rental charges of a machine might include $500 per month plus $5 per hour of use. The $500 per month is a fixed cost and $5 per hour is a variable cost.
Variable costs are those costs that vary depending on a company's production volume; they rise as production increases and fall as production decreases. Variable costs differ from fixed costs such as rent, advertising, insurance and office supplies, which tend to remain the same regardless of production output.