A company developed standard costs for direct materials and direct labor. In 20x4, the company estimated the following standard costs for one of their major products, a 30 gallon heavy duty plastic container INFORMATION PROVIDED BY A NURSERY FOR MONTH OF MAY Actual Budget Tulips Geraniums Tulips Geraniums Sales in Units 1,950 1,800 2,250 1,500 Contribution Margin Per $ 11.00 $ Unit 18.00 $ 10.00 $ 20.00 For May, the nursery will report a(n): Select one: a. Favorable sales mix variance. b. Unfavorable sales mix variance. c. Unfavorable sales volume variance. d. Favorable sales volume variance