It costs Lannon Fields $14 of variable costs and $6 of allocated fixed costs to produce an industrial trash can that sells for $30. A buyer in Mexico offers to purchase 2,000 units at $18 each. Lannon has excess capacity and can handle the additional production. What effect will acceptance of the offer have on net income? decrease $4,000 increase $4,000 increase $36,000 increase $8,000