Take me to the text Coral Rose is the owner of Rose Flower Shop. In the beginning of the year, she predicted the annual operating income to be $390,000. By the end of the year, she calculated the flexible budget for operating income to be $380,000. Determine the sales-volume variance. Indicate whether the variance is favorable or unfavorable. Do not enter dollar signs or commas in the input boxes. Enter the variance amount as a positive value