Garden Duty produces shovels and rakes. Sales and costs for the most recent year are indicated below: Shovels Rakes Units 8.000 20.000 $160,000 $40,000 Sales revenue Variable costs 98,000 18,000 Faed costs 12.000 28.000 $ 34,000 Profit $10.000 The number of units and selling price per unit of both products appears to be stable for the foresonable futuro. How much is the weighted average contribution margin per unit? $4.43 O $1.57 $0.42 O $3.00