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).
More scary shit: Here's how the Japanese hornet treats other insects (and would presumably treat us, if we were small enough). An adult hornet will fly miles to find some squishy shit to feed to its children. Often times, it finds its food in, say, a hive inhabited by thousands of bees.