E$7-23$ Bank Organizer Printers, Inc., produces luxury checkbooks with three checks and stubs per page. Each checkbook is designed for an individual customer and is ordered through the customer's bank. The company's operating budget for September $2017$ included these data: Data table: The budgeted amounts for September $2017$ were: Number of checkbooks $13,000$ Selling price per book $$19$ Variable cost per book $$6$ Fixed costs for the month $$130,000$ The actual results for September $2017$ were as follows: Number of checkbooks produced and sold $10,600$ Average selling price per book $$20$ Variable cost per book $$5$ Fixed costs for the month $$135,300$ The executive vice president of the company observed that the operating income for September was much lower than anticipated, despite a higher$-$than$-$budgeted selling price and a lower$-$than$-$budgeted variable cost per unit. As thecompany's management accountant, you have been asked to provide explanations for the disappointing September results. Bank Organizer develops its flexible budget on the basis of budgeted per$-$output$-$unit revenue andper$-$output$-$unit variable costs without detailed analysis of budgeted inputs. Requirements $1.$ Prepare a static$-$budget$-$based variance analysis of the September performance. $2.$ Prepare a flexible$-$budget$-$based variance analysis of the September performance. $3.$ Why might Bank Organizer find the flexible$-$budget$-$based variance analysis more informative than the static$-$budget$-$based variance analysis? Explain your answer. Actual flexible$-$budget$-$based variance Results Units sold Revenues Variable costs Contribution margin Fixed costs Operating income $($loss$)$