Practice questions I need to learn the full steps on working out the problems. Please help!

2. A company sells 200,000 products at a sales price of $2.70, and variable cost of $1.50 per product. Their fixed costs typically run $80,000. If they run a new ad campaign costing $11,000 during the Super Bowl, they expect to increase sales by 20%. What is the expected change in profits as a result of this potential ad campaign? 3. A company sells 260,000 products at a sales price of $3.12 and variable cost of $1.15 per bag. Their fixed costs typically run $75,000. If they run a new ad campaign costing $11,000 during the Super Bowl, they expect to increase sales by 20%. What is the expected total variable costs as a result of this potential ad campaign? 4. A company sells 210,000 products at a sales price of $5.20 and variable cost of $2.12 per product. Their fixed costs typically run $52,000. If they run a new ad campaign costing $11,000 each year, they expect to increase sales by 20%. What is the expected new breakeven level after the ad campaign is implemented