Dresser Company uses a standard cost system and sets predetermined overhead rates on the basis

Dresser Company uses a standard cost system and sets predetermined overhead rates on the basis of direct labor-hours. The following data are taken from the company's budget for the current year:

Denominator activity (direct labor-hours).................................................9,000
Variable manufacturing overhead cost at 9,000 direct labor-hour........$34,200
Fixed manufacturing overhead cost......................................................$63,000
The standard cost card for the company's only product is given below;
Direct material, 4 pounds @ $2.60 per pound.....................................$10.40
Direct labor, 2 direct labor-hours @ $9.00 per hour............................$18.00
Overhead, 2 direct labor-hours @ $10.80 per hour............................$21.60
Total standard cost per unit...................................................................$50.00

During the year, the company produced 4,800 units of product and incurred the following costs:

Material purchased, 30,000 pounds @ $2.50 per pound......................$75,000
Materials used in production (in pounds)................................................20,000
Direct labor cost incurred, 10,000 direct labor-hours @ $8.60 per
direct labor-hour....................................................................................$86,000
Variable manufacturing overhead cost incurred....................................$35,900
Fixed manufacturing overhead cost incurred.........................................$64,800

Required:
1. Redo the standard cost card using direct labor hours for the predetermined rate based on the denominator activity level of 9,000 direct labor hours.
2. Prepare the materials and labor variances for the year

3. Prepare the variable and fixed overhead variance for the year.
4. Please explain the fixed overhead volume variance.