Last month, Tech Industries sold its product for $50 per unit. Fixed production costs were $25,000, and variable production costs amounted to $10.50 per unit. Fixed selling and administrative costs totaled $15,000, and variable selling and administrative costs amount to $2.00 per unit. Tech Industries produced and sold 6,000 units last month. Using a contribution margin income statement, which of the following answers is the total contribution margin? $225,000 O $162,500 $185,000 $187.500