The Following Standard Costs Were Developed for One of the Products

The following standard costs were developed for one of the products of Ferrars Company:
Budgeted fixed overhead for the period was £600,000, and expected capacity for the period was 20,000 direct labour hours.
During the period just ended, Ferrars produced 15,000 units using 80,000 pounds of material and 23,000 direct labour hours. Total payroll cost was £288,000. The materials cost £3.70 per pound. Actual variable overhead cost was £220,000 and actual fixed overhead cost was £640,000.
Required:

a.
Calculate the variable overhead spending (expenditure)variance and indicate whether it is favorable or unfavorable.
b.
Calculate the variable overhead efficiency variance and indicate whether it is favorable or unfavorable.
c.
Calculate the fixed overhead spending (expenditure) variance and indicate whether it is favorable or unfavorable.