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Cost Flow Relationships The following information is available for the first month of operations of Lane Inc., a manufacturer of mechanical pencils: Sales $421,160 Gross profit 245,540 Indirect labor 91,390 Indirect materials 45,700 13,900 Other factory overhead Materials purchased Total manufacturing costs for the period Materials inventory, end of period 129,720 242,170 17,270 Using the above information, determine the following: a. Cost of goods sold: b. Direct materials cost: C. Direct labor cost