please explain

cannot follow your work / read your solutions....I cannot assign credit. 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 .. Variable expenses.......... Contribution margin ....... Fixed expenses. Net operating income... $20,000 12.000 8,000 6.000 $ 2,000 ... Required: (Answer each question independently and always refer to the original data unless instructed otherwise.) 1. What is the contribution margin per unit? 2. What is the contribution margin ratio? 3. What is the variable expense ratio? 4. If sales increase to 1,001 units, what would be the increase in net operating income? 5. If sales decline to 900 units, what would be the net operating income