Akyede Groups of Companies uses a standard cost system for its production process and applies overhead based on direct labour hours. The following information is available for May when Akyede produced 4,500 units: Standard: Direct labour hour per unit - 2.50, Variable overhead per direct labour hour - GH1.75, the fixed overhead per direct labour hour - GH3.10, Budgeted variable overhead - GH21,875, Budgeted fixed overhead - GH38,750. Actual: Direct labour hours - 10,000, Variable overhead- GH26,250, Fixed overhead- GH38,000. Calculate the total variable overhead cost and total fixed overhead cost variance, indicating the respective spending or expenditure variance and efficiency (volume) variance. show all workings clearly.