Hello! I am looking for help to find changes in net operating income:

Info:

Sales (13,300 units $20 per unit)$266,000

Variable expenses159,600

Contribution margin106,400

Fixed expenses118,400

Net operating loss$(12,000)

CM Ratio: 40%

Break even point in unit sales: 14,800

Break even point in dollar sales: 296,000

Situation 1:The president believes that a $6,700 increase in the monthly advertising budget, combined with an intensified effort by the sales staff, will result in an $83,000 increase in monthly sales. If the president is right, what will be the increase (decrease) in the company's monthly net operating income?

Situation 2: Refer to the original data. The sales manager is convinced that a 10% reduction in the selling price, combined with an increase of $40,000 in the monthly advertising budget, will double unit sales. If the sales manager is right, what will be the revised net operating income (loss)?

Situation 3:Refer to the original data. The Marketing Department thinks that a fancy new package for the laptop computer battery would grow sales. The new package would increase packaging costs by $0.60 per unit. Assuming no other changes, how many units would have to be sold each month to attain a target profit of $4,000?

Unit sales to attain target profit?

Please and thank you!!