Which of the following items is an example of an overhead expense?: (A)Rent on a factory. (B)Electricity, most of which is used to power a plant's machinery. (C)Raw materials used in manufacturing. (D)Shipping costs on goods sold. (Hint: Remember that overhead expenses are fixed costs, which must be paid regardless of the amount of business done.)

Nextdoor is an instant messaging application for smartphones. new smartphone users find it easier to connect with friends and relatives through this mobile app when compared to other similar instant messaging applications. hence, it has the largest user base in the industry. thus, nextdoor app's value has increased primarily due to itsa. learning curve effects. b. economies of scale. c. economies of scope. d. network effects.