Please explain for D how to find sales and variables without any unit. Is there is any formula please explain on the side how to find them. Thanks

Case Sales Units Sold 20,000 Variable Expenses $220,000 $120,000 Contribution Margin per Unit ? $300,000 ? Fixed Expenses $45,000 ? Net Operating Income ? $18,000 B 12,000 $15 Case Sales Variable Expenses Average Contribution Margin Ratio 40% Fixed Expenses ? Net Operating Income $125,000 $37,500 C $900,000 ? D ? ? 45% $120,000 Required: 1. Cases A and B assume that only one product is being sold. 2. Cases C and D assume that more than one product is being sold