b. Assuming Budgeted sales and production volume was 81,600 units a standard selling price of GHe59 and standard variable cost of GHc24. Actual results shows Sales and production volume of 82,400 units which was sold for GHe57 per unit and variable cost of GHe23 per unit was incurred. Calculate the Total Sales Variance, Sales Price Variance, Sales Volume Variance and Sales Volume Contribution Variance