The XTRA Appliance Manufacturing Corporation manufactures two vacuum cleaners, the Standard and the Super. The following information was gathered about the two products: Standard Super Budgeted sales in units 3,200 800 Budgeted selling price $600 $1,700 Budgeted contribution margin per unit $420 $1,100 Actual sales in units 3,500 1,500 Actual selling price $650 $1,680 What is the total sales-quantity variance in terms of the budgeted contribution margin? A) $220,000 favorable B) $340,000 favorable C) $556,000 favorable D) $896,000 favorable