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Problem 15-21A (Algo) Determining and interpreting flexible budget variances LO 155 Vernon Publications established the following standard price and costs for a hardcover picture book that the compary produces. Assume that Vernon actually produced and sold 29,000 books. The actual sales price and costs incurred follow: Required a. \& b. Determine the flexible budget variances and also indicate whether each variance is favorable (F) or unfavorable (U). (Select. "None" If there is no effect (i.e., zero variance).) Required a. & b. Determine the flexible budget variances and also indicate whether each variance is favorable \{F) or unfauorable (U), (Select. "None" if there is no effect (tie., zero variance).)