You are the managerial accountant for ABC Company. ABC Company is a manufacturer of heating, ventilation, and air conditioning (HVAC) units. They bill their customers for a lump- sum price which includes installation charges. ABC Company was selected for a routine sales tax audit. The auditor is assessing tax on the lump-sum charge that was billed to the customer. The owners of ABC Company lost all their books and records and is asking you for any help to provide documents to determine the cost a the manufactured HVAC unit. The auditor is assessing tax on the total charge which includes installation charges (which are not part of the product cost). You need to help your manager show the auditor the manufacturing cost to make the HVAC unit to allow a correct assessment of the selling price of the HVAC unit Explain how you would do this Some possible keywords to mention in the explanation: Employee time ticket Purchase invoices Material requisition form Job cost sheet Reasonable Markup on Cost Predetermined overhead rate Manufacture Overhead Direct Labor Direct Materials Job costing system