with the attached, how do i calculate the sales mix variance?

Master Budget Games 40,000 DVD's $640,000 Business 2000 DVD's $110,000 Educational10000 Dvd's $200,000 $950,000 52000 DVD's $104,000 $535,000 $311,000 Actual 35,000 DV 4,000 DVDs 11,000 DV 50,750 DV $616,000 198,000 220,000 $1,034,000 106,575 533,500 $393,925 Sales Mix Variance