Total material cost for 500,000 units = 6 x 500,000 = $3,000,000
Total labor cost for 500,000 units = 5 x 500,000 = $2,500,000
Production overhead = $1,000,000
Advertising and promotion = $1,000,000
Hence
Total cost for 500,000 units of cordova design = 3,000,000 + 2,500,000 + 1,000,000 + 1,000,000 = $7,500,000