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): sales $ 100,000 variable expenses 65,000 contribution margin 35,000 fixed expenses 30,100 net operating income $ 4,900 foundational 6-1 (algo) required: 1. what is the contribution margin per unit?