Gibson Manufacturing Company established the following standard price and cost data: Sales price $ 8.90 per unit Variable manufacturing cost $ 3.10 per unit Fixed manufacturing (ost $ 2,300 total Fixed selling and administrative (oat $ 700 total Gibson planned to produce and sell 2,800 units. Actual production and sales amounted to 3,000 units. Assume that the actual sales price is $8.70 per unit and that the actual variable cost is $3.30 per unit. The actual fixed manufacturing cost is $1,900, and the actual selling and administrative costs are $720. Req uired a.&b. Determine the flexible budget variances and classify the effect of each variance by selecting favorable (F) or unfavorable (U). Note: Select "None" if there is no effect {i.e.. zero variance}. Sales Variable manufacturing Contribution margin Fixed manufacturing Fixed selling and administrative cost Net income (loss)