need explenation!

QUESTION 2 Salamone Heaters selected data for October, 2015, are presented here. Direct materials Inventory, October 1, 2015, $1100, Direct materials purchased, $6500, Direct materials used, $5780, Total manufacturing overhead costs, $4350, Variable manufacturing overhead costs, $2800 Manufacturing costs incurred during October, 2015, $16530, Work in process inventory, October 1, 2015, $750, Cost of goods manufactured, $16420, Finished goods inventory, October 1, 2015, $1950, Cost of goods sold, $16870. Calculate the following costs. 1. Direct materials inventory, October 31, 2015, 2. Fixed manufacturing overhead costs for October, 2015, 3. Direct manufacturing labor costs for October, 2015, 4. Work in process inventory, October 31, 2015, 5. Cost of finished goods available for sale in October, 2015, and 6. Finished goods inventory, October 31, 2015