Cholla Company's standard fixed overhead rate is based on budgeted fixed manufacturing overhead of $10,200 and budgeted production of 30,000 units. Actual results for the month of October reveal that Cholla produced 28,000 units and spent $9,900 on fixed manufacturing overhead costs. Calculate Cholla's fixed overhead spending variance. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable.)