Top managers of Preston Industries predicted 2018 sales of 14,400 units of its product at a unit price of $7.00. Actual sales for the year were 14,100 units at $9.00 each. Variable costs were budgeted at $2.60 per unit, and actual variable costs were $2.70 per unit. Actual fixed costs of $44,000 exceeded budgeted fixed costs by $4,500. Prepare Preston's flexible budget performance report. What variance contributed most to the year's favorable results? What caused this variance? Prepare a flexible budget performance report for the year. First, complete the flexible budget performance report through the contribution margin line, then complete the report through the operating income line. Finally, compute the total variances. (Enter a "0" for any zero balances. For any $0 variances, leave the Favorable (F)/Unfavorable (U) input blank.) Units Sales Revenue Variable Costs Contribution Margin Fixed Costs Operating Income Preston Industries Flexible Budget Performance Report For the Year Ended December 31, 2018 1 2 3 4 5 (1)-(3) (3)-(5) Budget Flexible Amounts Actual Per Unit Results Budget Variance Flexible Budget Sales Volume Variance Static Budget What variance contributed most to the year's favorable results? What caused this variance? The variance contributing most to the year's excellent results is the favorable . This variance resulted from selling the company's product at