Calculate the expected gross margin next month

Question

Solo Company is a small merchandising firm. During the next month, the company expects to sell 500 units. The company has the following revenue and cost structure

Selling price per unit                                        $60

Cost per unit                                                    $15

Sales commissions                                           10% of sales

Advertising expense                                        $5,000 per month

Administrative expense                                   $3,000 per month plus 20% of sales

Required

1. Calculate the expected gross margin next month. 
2. Calculate the expected contribution margin next month. 
3. Calculate the expected total administrative expense next month. 
4. Calculate the expected net operating income next month.