Data for Klauer Corporation are shown below:

	Per Unit				Percent of Sales
Selling price	$	90				100	%
Variable expenses		63				70
Contribution margin	$	27				30	%

Fixed expenses are $78,000 per month and the company is selling 3,500 units per month.

rev: 06_04_2020_QC_CS-205709, 06_18_2020_QC_CS-216765, 07_14_2020_QC_CS-216765

Required:

1-a. How much will net operating income increase (decrease) per month if the monthly advertising budget increases by $8,300 and monthly sales increase by $16,200?

1-b. Should the advertising budget be increased?