What form of pay equity exists when employees are paid according to the differences in job characteristics within the company?

Swain company manufactures one product, it does not maintain any beginning or ending inventories, and its uses a standard cost system. the company's beginning balance in retained earnings is $65,000. it sells one product for $170 per unit and it generated total sales during the period of $603,500 while incurring selling and administrative expenses of $54,500. swain company does not have any variable manufacturing overhead costs and its standard cost card for its only product is as follows: