Can someone explain with steps please?

Campbell Manufacturing Company established the following standard price and cost data: Campbell planned to produce and sell 2,500 units. Actual production and sales amounted to 2,800 units. Assume that the actual sales price is $7.95 per unit and that the actual variable cost is $4.00 per unit. The actual fixed manufacturing cost is $2,400, and the actual selling and administrative costs are $825. Required a.\&b. Determine the flexible budget variances and classify the variances by selecting favorable (F) or unfavorable (U). (Select "None" if there is no effect (i.e., zero variance).)