Robinwood Fixtures manufactures two products, K4 and X7. The company prepares its master budget on the basis of standard costs. The following data are for September:

	K4	X7
Standards
Direct materials	0.75	pounds at $6.00 per pound	1	pound at $6.60 per pound
Direct labor	1.25	hours at $24 per hour	1.5	hours at $30 per hour
Variable overhead (per direct labor-hour)	$ 19.20		$ 21.00
Fixed overhead (per month)	$ 402,408		$ 477,360
Expected activity (direct labor-hours)	17,250		23,400
Actual results
Direct material (purchased and used)	9,300	pounds at $5.40 per pound	14,100	pounds at $6.90 per pound
Direct labor	14,700	hours at $24.30 per hour	22,200	hours at $30.60 per hour
Variable overhead	$ 291,060		$ 454,212
Fixed overhead	$ 376,740		$ 475,200
Units produced (actual)	12,000	units	14,400	units

Required:

a. Prepare a variance analysis for each variable cost for each product.

b. Prepare a fixed overhead variance analysis for each product.

Note: For all requirements, Do not round intermediate calculations. Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.