Help with 9-12 with breakdown please

9)If a company's contribution margin ratio is 0.40 , targeted operating income is $80,000, and targeted sales volume in dollars is $500,000, then the operating leverage factor is how much? 10)Corp believes that by spending $50 on an ad campaign, it will be able to generate an additional $12 in net income (which is after-tax operating income). Assume the tax rate is 40% and the contribution margin ratio (percentage) is 25%. This must mean that Corp believes the ad campaign will increase sales revenue by what dollar amount? 11)Corp makes jackets and uses machine-hours as the single indirect-cost rate to allocate O/H. The following estimates are provided for the coming year for the company overall and for Job 101 specifically. What is the annual manufacturing overhead cost-allocation rate for Corp's entire company (plant-wide) rate? 12)What amount of O/H costs will be allocated to Job 101