Problem 15-20A (Algo) Determining sales and variable cost volume variances LO 15-2, 15-3, 15-4 Rundle Publications established the following standard price and costs for a hardcover picture book that the company produces. Rundle planned to make and sell 38,000 copies of the book. Required: a. - d. Prepare the pro forma income statement that would appear in the master budget and also flexible budget income statements, assuming production volumes of 37,000 and 39,000 units. Determine the sales and variable cost volume variances, assuming volume is actually 39.000 units. Indicate whether the variances are favorable (F) or unfavorable (U). (Select "None" if there is no effect (l.e., zero variance).) Rundle planned to make and sell 38,000 copies of the book. Required: a. - d. Prepare the pro forma income statement that would appear in the master budget and also flexible budget income statements, assuming production volumes of 37,000 and 39,000 units. Determine the sales and variable cost volume variances, assuming volume is actually 39,000 units. Indicate whether the variances are favorable (F) or unfavorable (U). (Select "None" if there is no effect (i.e.., zero variance).)