top managers of Preston Preston Industries predicted 2014 2014sales of 14 comma 400 14,400 units of its product at a unit priceof $ 8.50 $8.50. Actual sales for the year were 14 comma 300 14,300units at $ 9.50 $9.50 each. Variable costs were budgeted at $ 2.60$2.60 per? unit, and actual variable costs were $ 2.70 $2.70 perunit. Actual fixed costs of $ 45 comma 000 $45,000 exceededbudgeted fixed costs by $ 3 comma 500 $3,500. Prepare PrestonPreston?'s flexible budget performance report. What variancecontributed most to the? year's favorable? results? What causedthis? variance?