Data for Herron Corporation are shown below:

	Per Unit			Percent of Sales
Selling price	$	70		100%
Variable expenses		42		60%
Contribution margin	$	28		40%

Fixed expenses are $75,300 per month and the company is selling 4,000 units per month. (Input the amount as a positive value. Do not round intermediate calculations. Round your answer to 2 decimal places.)

Management is considering using higher-quality components that would increase the variable cost by $4 per unit. The marketing manager believes that the higher-quality product would increase sales by 16% per month. Calculate the change in total contribution margin.

Total contribution margin (Click to select)decreasesincreases by

$