The following costs relate to one month's activity in Martin Company:

Indirect materials- $300

Rent on factory building- $500

Maintenance of equipment- $50

Direct material used- $900

Utilities on factory- $250

Direct labour- $1,500

Selling expense- $500

Administrative expense- $300

Work in process inventory, beginning- $600

Work in process inventory, ending- $800

Finished goods inventory, beginning- $500

Finished goods inventory, ending- $200

a. Draw up a schedule of cost of goods manufactured in good form.

b. Determine the cost of goods sold.

c. Assume Martin Company produced the equivalent of 500 units during this particular month. What was the average cost per unit for direct materials? For rent on factory building?