Required information [The following information applies to the questions displayed below.] Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000u (the relevant range of production is 500 units to 1,500 units): Required: 1. What is the contribution margin per unit? Note: Round your answer to 2 decimal places. Required information [The following information applies fo the questions displayed below.] Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): Required: 2. What is the contribution margin ratio? [The following information applies to the questions displayed below.] Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 un (the relevant range of production is 500 units to 1,500 units): Required: 3. What is the variable expense ratio