need help solving this

Vision Tester, Inc., a manufacturer of optical glass, began operations on February 1 of the current year. During this time, the company produced 8,000 units and sold 7,000 units at a sales price of $30 per unit. Cost information for this year is shown in the following table: Given this information, how much is the difference in net income between absorption and variable costing? Hint: you can either calculate net income under both methods to compare, or you can save time and use the short cut that we discussed in the class. $9,000. No difference. $6,000