Use the following information to answer the question:

1. Acquired $30,000 of Capital from owners.

2. Paid $10,000 for all material used in starting and completing 50 products this period.

3. Paid $6,000 for administrative salaries.

4. Paid $8,000 for wages of production workers.

5. Depreciation of office furniture $2,500.

6. Depreciation of manufacturing equipment $3,500.

7. Collected $28,000 in cash for all sales made during the period.

There is no beginning or ending inventory.

What was Gross Margin for the period?

a.$ 2,150

b.$ 6,500

c.$ 28,000

d.$ 30,000