The original budget is based on the expectation that 14,040 books would be bound, the standard is 26 books per hour at a pay rate of $26 per hour. During the week, 15,340 books were actually bound. Employees worked 550 hours at an actual total cost of $14,850. Required: a. Calculate the flexed budget amount against which actual performance should be evaluated and then calculate the budget variance, b. Calculate the direct labor efficiency variance in terms of hours. c. Calculate the direct labor rate variance. Note: Do not round intermediate calculations. Note: For all requirements, indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance)