Cost of Production Report: No Beginning Inventories Howell Paving Company manufactures asphalt paving materials for highway construction through a one-step process in which all materials are added at the beginning of the process. During April 2017, the company accumulated the following data in its process costing system: Manufacturing overhead is applied at the rate of $6 per equivalent unit (ton) processed. Manufacturing overhead is applied at the rate of $6 per equivalent unit (ton) processed