Kentford Associates is a small professional services firm. Last month, Kentford billed more hours than expected and profits reflected this. Reported Income Statement Master Budget Billable hoursa 5,805 5,400 Revenue $ 1,124,000 $ 1,080,000 Professional salaries (all variable) 524,000 500,000 Other variable costs (e.g., supplies, computer services) 156,000 140,000 Fixed costs 260,000 275,000 Profit $ 184,000 $ 165,000 aThese are hours billed to clients. They are fewer than the number of hours worked because there is nonbillable time (e.g., slack periods, time in training sessions) and because some time worked for clients is not charged to them. Required: Prepare a sales activity variance analysis. Note: 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