Assume that Gibson actually produced and sold 37,000 books. The actual sales price and costs incurred follow: Required \& b. Determine the flexible budget variances and also indicate the effect of each variance by selecting favorable (F) or unfavorable U). Vote: Select "None" if there is no effect (i.e., zero variance). a. \& b. Determine the flexible budget variances and also indicate the effect of each variance by selecting favorable (F) or unfavorable (U). Note: Select "None" if there is no effect (i.e., zero variance)