Some costs have components that are fixed and some that are variable. One example is wages for your sales force. A portion of the wage for a salesperson may be a fixed salary and the rest may be sales commission.
Hornets are the largest eusocial wasps, reaching up to 45 millimetres (1.8 inches) in length. Yellowjackets are black-and-yellow wasps of the genus Vespula or Dolichovespula (some can be black-and-white, the most notable of these being the bald-faced hornet, Dolichovespula maculata).
Dragonflies come in many sizes. The average size of a dragonfly is from 1 to 4 inches in length. In prehistoric times dragonflies were much larger - the largest flying insects ever. The largest member of extinct dragonflies had a wing span of about 70-75 cm or about 30 inches.