Monarch caterpillars feed on all the different parts of milkweed plants and store up the toxins in their body. The toxins remain in their system even after metamorphosis, thereby making adult monarchs poisonous as well. Adult monarchs feed on nectar from a wide range of flowers, including milkweeds.
What is an 'Operating Expense'. An operating expense is an expense a business incurs through its normal business operations. Often abbreviated as OPEX, operating expenses include rent, equipment, inventory costs, marketing, payroll, insurance and funds allocated toward research and development.
Under accounting guidelines, rent expense belongs to the selling, general and administrative accounts category. Other SG&A items include charges as diverse as litigation, office supplies, money a business pays to settle regulatory liabilities, salaries, insurance and depreciation.eporting. As an SG&A cost, rent is an operating expense because a company uses real property -- such as office buildings and production plants -- to operate, make money and exist commercially.