The following information is available for Brownstone Products Company for the month of July:

	Actual			Master Budget
Units		3,800			4,000
Sales revenue		$60,600			$60,000
Variable manufacturing costs		21,000			16,000
Fixed manufacturing costs		14,000			13,900
Variable selling and administrative expenses		9,700			8,000
Fixed selling and administrative expenses		11,100			10,500

Required:
1.	Compute the July sales volume variance and the flexible-budget variance for the month in terms of both contribution margin and operating income. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values. )

Contribution Margin and Operationg Income for Flexible Budget Variance & Sales Volume Variance.