Prepare a contribution margin income statement

Assume that you are part of the accounting team for Starr Computing. The company has only one product that sells for $20 per unit. Starr estimates total fixed costs to be $9,800. Starr estimates direct materials cost of $4.00 per unit, direct labor costs of $5.00 per unit, and variable overhead costs of $1.00 per unit. The CEO would like to see what the gross margin and operating income will be if 1400 units are sold in the next period. Prepare a contribution margin income statement

I do not understand how to find:

Sales

variable costs

operating income