Data for Hermann Corporation are shown below:

	Per Unit				Percent of Sales
Selling price	$	130				100	%
Variable expenses		78				60
Contribution margin	$	52				40	%

Fixed expenses are $86,000 per month and the company is selling 2,800 units per month.

Required:

1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $9,100 and monthly sales increase by $19,500?