Davison Co$.$ prepared the following contribution format income statement based on a sales volume of $10,000$ units $($the relevant range of production is $5,000$ units to $15,000$ units$)$:SalesVariable expensesContribution marginFixed expensesNet operating income$$290,000174,000116,00087,00029,000$Required:What is the contribution margin per unit? $($Round your answer to $2$ decimal places.$)$