The hf corporation manufactures and sells toy gyroscopes. the following data is related to sales and production of the toy gyroscopes for last year. selling price per unit $ 8.00 variable manufacturing costs per unit $ 1.83 variable selling and administrative expenses per unit $ 4.45 fixed manufacturing overhead (in total) $ 75,000 fixed selling and administrative expenses (in total) $ 80,000 units produced during the year 500,000 units sold during the year 150,000 using variable costing, what is the contribution margin for last year? a. $2,142,000 b. $274,500 c. $1,200,000 d.$752,300