King Company estimated that it would operate its manufacturing facilities at 800,000 direct labour-hours for the year and this served as the denominator activity in the predetermined overhead rate. The total budgeted manufacturing overhead for the year was $2,000,000, of which $1,600,000 was variable and $400,000 was fixed. The standard variable overhead rate was $2 per direct labour-hour. The standard direct labour time was 3 direct labour-hours per unit. The actual results for the year are presented below: Actual finished units 250,000 Actual direct labour-hours 764,000 Actual variable overhead $1,610,000 Actual fixed overhead $392,000 Calculate the following: (a) The variable overhead spending variance for the year (b) The variable overhead efficiency variance for the year (c) The fixed overhead budget variance for the year (d) The fixed overhead volume variance for the year