If you can include an explanation, that would be great! Thank you!

Use the following information for the next four questions. Platz Company makes chairs and planned to sell 3, 200 chairs in its master budget for the coming year. The budgeted selling price is $45 per chair, variable costs are $15 per chair and budgeted fixed costs are $40,000 per month. At the end of the year it was determined that Platz actually sold 3, 100 chairs for $ 145, 700. Total variable costs were $50, 375 and fixed costs were $38,000. The volume variance for sales revenue was A. $4, 500 unfavorable B. $100 unfavorable C. $4, 500 favorable D. $1, 700 favorable The flexible budget variance for sales revenue was A. $1, 700 favorable B. $6, 200 favorable C. $1, 700 unfavorable D. $6, 200 unfavorable The volume variance for fixed costs is A. $2,000 favorable B. $0 C. 100 unfavorable D. $2,000 unfavorable The flexible budget variance for total expenses is A. $1, 875 unfavorable B. $2,000 favorable C. $3, 875 unfavorable D. $2, 125 unfavorable