please answer with calculation details

7. The contribution margin ratio for this company will be? 1 point A cement company has the following information: 120,000 Tons of cement produced and sold Sales $835,000 $188,000 Variable Manufacturing Expense Fixed Manufacturing Expense $100,000 Variable Selling & Admin Expense $72,000 Fixed Selling & Admin Expense $35,000 52.7% 77.5% 68.9% O 145.2%