Watson Industries is in the process of analyzing its manufacturing overhead costs. Management is not sure if the number of units produced or the number of direct labor (DL) hours is the best cost driver to use for predicting manufacturing overhead (MOH) costs. The following information is available: Month Manufacturing Overhead Costs Direct Labor Hours Units Produced MOH Cost per DL Hour MOH Cost per Unit Produced July ............................ $485,000 25,000 3,800 $19.40 $127.63 August ....................... $540,000 26,700 4,360 $20.22 $123.85 September ................. $420,000 20,000 4,210 $21.00 $99.76 October ..................... $462,000 21,900 3,450 $21.10 $133.91 November ................. $579,000 32,000 5,600 $18.09 $103.39 December .................. $455,000 20,400 3,270 $22.30 $139.14 Requirements 1. Are manufacturing overhead costs fixed, variable, or mixed? Explain. 2. Graph the company's manufacturing overhead costs against DL hours. 3. Graph the company's manufacturing overhead costs against units produced. 4. Do the data appear to be sound, or do you see any potential data problems? Explain. 5. Use the high-low method to determine the company's manufacturing overhead cost equation using DL hours as the cost driver. Assume that management believes all the data to be accurate and wants to include all of it in the analysis. 6. Estimate manufacturing overhead costs if the company incurs 26,000 DL hours in January