A Sales Quantity Variance for a Given Product Is Computed

A sales quantity variance for a given product is computed as

A) (actual volume of all products sold - budgeted volume of all products sold) x actual sales mix of the product x budgeted unit contribution margin of the product.
B) (actual volume of all products sold - budgeted volume of all products sold) x budgeted sales mix of the product x actual unit contribution margin of the product.
C) (actual volume of all products sold - budgeted volume of all products sold) x actual sales mix of the product x actual unit contribution margin of the product.
D) (actual volume of all products sold - budgeted volume of all products sold) x budgeted sales mix of the product x budgeted unit contribution margin of the product.