the corata 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 2,700 900 budgeted selling price $600 $1,700 budgeted contribution margin per unit $700 $1,050 actual sales in units 3,000 1,200 actual selling price $650 $1,680 what is the total salesmix variance in terms of the contribution margin? (round intermediary calculations to two decimal places.)