L Wages of train engineers EX 15-8 Classifying costs The following is a manufacturing cost report of Marching Ants Inc. 061-20 For the Quarter Ended June 30 Marching Ants Inc. Manufacturing Costs Materials used in production (including $56,200 of indirect materials) $ 607,500 Direct labor (including $84,400 maintenance salaries) Factory overhead: Supervisor salaries-plant. 562,500 517,500 Heat, light, and power-plant. 140,650 348,750 Sales salaries....... 315,000 Promotional expenses.. Insurance and property taxes-plant.. 151,900 Depreciation-plant and equipment Insurance and property taxes-corporate offices. 219,400 123,750 Depreciation-corporate offices 90,000 $3,076,950 Total. a. List the errors in the preceding report. b. Prepare a corrected report. manufacturing firm