[Solved] Evolutionary psychologists attribute gender differences in mating preferences to A) gender schemas. B) natural selection. C) refractory periods. D) erotic plasticity. Work In Process: Products that are in the middle of the production process and are not yet completed; represents a component of inventory on the balance sheet. Finished Goods: Goods that are completed production and are now available for customer acquisition. Manufacturing Overhead: All indirect costs related to manufacturing, such as maintenance, supervision, and utilities, not directly tied to any specific product unit. Indirect Materials: Materials used in the production process but not directly traceable to a specific product, such as lubricants and adhesives used in machinery.