V is electric potential or voltage in volts. Electricity generation is often done with electric generators, but can also be supplied by chemical sources such as electric batteries or by other means from a wide variety of sources of energy. Electric power is generally supplied to businesses and homes by the electric power industry.
Depending on where you adopt, fees can range up to $400. Purchasing a Great Dane from a breeder can cost between $600 and $3,000, depending on the breeder and the dog itself. The higher price tag usually comes with a show-quality dog, which you might not need if you're just in the market for a pet.
The average cost for a dog can range from $300 all the way to $1000. Anywhere from $50 to $5000, depending on the source and the quality of the dog. Please, please don't buy a pet from a pet shop. ALL puppies in pet stores come from puppy mills, and are grossly overpriced as well.