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: (Answer each question independently and ahwas refer to the original data unless instructed otherwise]) 1. If sales increaso to 1,001 units, what would be the increase in net operating income? 2. If sales decline to 900 units, what would be the net operating income? 3. How many units must be sold to achieve a target proft of $5,000 ? 4. What is the margin of safety in dolars? What is the margin of safety percentige? 5. Using the degree of operating leverag0, what is the estimated percent increase in net operating income of a 5 , increase in saica